Digital Advertising FAQ

PPC Fundamentals

What is PPC?

PPC (Pay-Per-Click) is an advertising model where you pay each time someone clicks on your ad. Google Ads is the largest PPC platform, but the model also applies to Bing Ads, social media ads, and programmatic display. Unlike SEO, PPC delivers immediate traffic - but that traffic stops the moment your budget runs out.

How does Google Ads work?

Google Ads runs an auction every time someone searches. Advertisers bid on keywords, and Google combines your bid amount with your Quality Score to determine your Ad Rank. The highest Ad Rank wins the top position, but you only pay the minimum needed to beat the advertiser below you. This means a better Quality Score lets you pay less per click than competitors with higher bids.

What is the difference between Search and Display?

Search ads appear on Google's results page when someone actively searches for a keyword. Display ads appear across Google's display network of partner websites as banners, images, or text boxes. Search captures existing demand (someone looking for "running shoes"), while Display creates awareness among people who are not actively searching. Search typically has higher intent and conversion rates; Display offers broader reach at a lower cost per impression.

What is a bid strategy?

A bid strategy tells Google how to set your bids for each auction. Manual CPC gives you direct control over individual keyword bids. Automated strategies like Maximize Conversions or target ROAS let Google's AI adjust bids in real-time based on signals like device, location, time of day, and audience. Most advertisers start manual and shift to automated once they have enough conversion data for the algorithm to learn from.

What is Quality Score?

Quality Score is Google's 1-10 rating of the quality and relevance of your keywords, ads, and landing pages. It directly affects your cost per click and ad position. Three factors determine it: expected click-through rate, ad relevance to the keyword, and landing page experience. A Quality Score of 7 or higher means you are paying less than average per click; below 5 means you are overpaying.

Larry Kim documented a revealing data point about how landing page and keyword relevance drive Quality Score outcomes:

How much should I spend on ads?

Start with enough budget to generate statistically meaningful data - typically $500 to $2,000 per month for small businesses. The right budget depends on your industry's average CPC, your target geography, and how many keywords you want to cover. A common framework: work backward from your target cost per acquisition (CPA) and desired customer volume. If your target CPA is $50 and you want 20 customers per month, plan for roughly $1,000 in ad spend plus a margin for testing.

What are ad extensions?

Ad extensions (now called "assets" in Google Ads) add extra information beneath your ad text - phone numbers, additional links, location, prices, or callouts. They make your ad larger on the page and provide more reasons to click. Google uses extensions as a factor in Ad Rank, so adding them can improve your position without increasing your bid. Sitelinks, callouts, and structured snippets are the three extensions every account should have enabled.

What is Ad Rank?

Ad Rank determines your ad's position on the search results page. Google calculates it by multiplying your bid by your Quality Score and factoring in expected impact from ad extensions and ad formats. A higher Ad Rank means a higher position, but you only pay the minimum needed to clear the Ad Rank of the advertiser below you. This is why improving Quality Score is the most cost-effective way to improve your ad position.

Google Ads

What is Performance Max?

Performance Max (PMax) is Google's AI-driven campaign type that runs ads across all Google inventory - Search, Display, YouTube, Gmail, Maps, and Discover - from a single campaign. You provide creative assets and conversion goals, and Google's machine learning optimizes placement and bidding automatically. PMax works well for e-commerce with product feeds but offers limited visibility into which channels drive results, making optimization harder than with traditional campaign types.

What are responsive search ads?

Responsive search ads (RSAs) let you provide up to 15 headlines and 4 descriptions, and Google automatically tests different combinations to find the best performers. RSAs replaced expanded text ads as the default search ad format in 2022. Write headlines that work in any combination - avoid references like "as mentioned above" that assume a specific order. Pin your most important message to position 1 if you need it to always appear.

How do I structure my Google Ads account?

The standard structure is Account > Campaigns > Ad Groups > Keywords/Ads. Campaigns control budget and geographic targeting. Ad groups cluster tightly related keywords with ads written specifically for that theme. Avoid cramming too many unrelated keywords into one ad group - when your ad does not match the search query, Quality Score drops and costs rise. Most successful accounts use 5-20 keywords per ad group, grouped by intent.

What is keyword match type?

Match types control which searches trigger your ads. Broad match shows ads for searches related to your keyword (widest reach). Phrase match triggers for searches that include the meaning of your keyword. Exact match limits triggers to searches with the same meaning as your keyword (most precise). Google has expanded all match types significantly - even exact match now includes close variants, synonyms, and implied intent.

What are negative keywords?

Negative keywords prevent your ads from showing for specific search terms. If you sell premium running shoes, adding "cheap" and "free" as negatives stops your ads from appearing for bargain searches. Review your Search Terms Report regularly to find irrelevant queries burning budget. Most accounts waste 20-30% of spend on irrelevant clicks that proper negative keyword management would eliminate.

Ginny Marvin highlighted the frustration many advertisers felt when Google reduced search term visibility:

How do I write good ad copy?

Lead with the benefit, not the feature. Include your target keyword in at least one headline. Add a clear call-to-action ("Get a free quote" beats "Learn more"). Use numbers and specifics - "Save 40%" outperforms "Save money." Test different value propositions rather than just different phrasing of the same message. The best ad copy addresses the searcher's specific problem and makes the next step obvious.

What is Smart Bidding?

Smart Bidding is Google's subset of automated bid strategies that use machine learning to optimize for conversions or conversion value. It includes target CPA, target ROAS, Maximize Conversions, and Maximize Conversion Value. Smart Bidding adjusts bids in real-time using signals like device, location, time, remarketing list, and browser. It requires at least 15-30 conversions per month to work effectively - below that threshold, the algorithm lacks enough data to learn.

What are audience signals?

Audience signals tell Google which types of users are most likely to convert, guiding the AI toward better targeting. In Performance Max campaigns, audience signals are suggestions rather than hard targeting constraints - Google can expand beyond them if it finds converting users elsewhere. Include your customer lists, website visitors, in-market audiences, and custom segments. Strong audience signals accelerate the learning phase and improve early campaign performance.

Social Advertising

How do Facebook Ads work?

Facebook Ads (now Meta Ads) target users based on demographics, interests, behaviors, and custom audiences rather than search keywords. You create campaigns with an objective (awareness, traffic, conversions), define your audience, set a budget, and design your creative. The platform's algorithm then optimizes ad delivery to the users most likely to take your desired action. Unlike search ads, social ads interrupt the user's browsing - so creative quality matters far more than keyword relevance.

What is a lookalike audience?

A lookalike audience is a targeting option that finds new users who share characteristics with your existing customers. You upload a source audience (like your customer email list or website converters), and Meta's algorithm identifies similar users in the broader population. Lookalikes typically perform better than interest-based targeting because they are modeled on people who have actually converted. Start with a 1% lookalike (closest match) and expand to 3-5% as you scale.

What is retargeting?

Retargeting (also called remarketing) shows ads to people who have already visited your website or interacted with your brand. Only 2-5% of visitors convert on their first visit, so retargeting keeps your brand visible as they continue browsing. Common retargeting strategies include showing product-specific ads to people who viewed but did not purchase, and offering discounts to cart abandoners. Retargeting typically delivers the lowest CPA of any advertising tactic.

How do I measure social ad ROI?

Track conversions using the platform's pixel plus your own analytics. Compare your cost per acquisition (CPA) against the lifetime value (LTV) of acquired customers, not just the initial purchase value. Attribution on social is messier than search because the path from ad impression to conversion often spans multiple sessions and devices. Use UTM parameters on all ad links and cross-reference platform-reported conversions with your own data to get an honest picture.

What is the Facebook Pixel?

The Facebook Pixel (now Meta Pixel) is a snippet of JavaScript installed on your website that tracks visitor actions and sends that data back to Meta. It powers conversion tracking, audience building for retargeting, and lookalike audience creation. Without the pixel, you are flying blind - Meta cannot optimize delivery toward users who convert, and you cannot measure true ROI. Install it on every page of your site, not just the checkout page.

What is creative fatigue?

Creative fatigue occurs when your target audience has seen your ad too many times, causing click-through rates to drop and costs to rise. It typically sets in after an ad has been shown to the same user 3-5 times. The fix is rotating fresh creative regularly - plan for new variations every 2-4 weeks depending on audience size and budget. Monitoring frequency metrics in your ad platform helps you spot fatigue before it tanks performance.

Measurement & Attribution

What is ROAS?

ROAS (Return on Ad Spend) measures the revenue generated for every dollar spent on advertising. A ROAS of 4x means $4 in revenue for every $1 in ad spend. Target ROAS varies by industry and margin structure - a business with 80% gross margins can afford a lower ROAS than one operating at 20% margins. ROAS is the most common KPI for e-commerce advertisers because it directly ties ad spend to revenue.

How do I track conversions?

Install conversion tracking tags from each ad platform (Google Ads tag, Meta Pixel, etc.) on your website. Define what counts as a conversion - purchases, form submissions, phone calls, or specific page views. Use Google Tag Manager to manage all your tags in one place without editing site code. Always verify tracking is working by testing conversions yourself before spending budget. Broken conversion tracking is the most expensive mistake in PPC because the algorithm optimizes toward the wrong signals.

What is a conversion window?

A conversion window is the time period after a click (or impression) during which a conversion is attributed to the ad. Google Ads defaults to 30 days for clicks and 1 day for views. If someone clicks your ad today and buys 15 days later, that conversion counts. Longer windows capture more conversions but can make it harder to tie specific campaign changes to results. Adjust the window to match your typical sales cycle.

What is view-through conversion?

A view-through conversion happens when someone sees your ad, does not click, but later converts on your website through another path. Display and video campaigns often generate view-through conversions because they build awareness that converts later via search or direct visit. These conversions are valuable but should be evaluated separately from click-through conversions, as the causal link is weaker. Most platforms use a 1-day view-through window by default.

What is incrementality testing?

Incrementality testing measures whether your ads actually cause additional conversions or just capture conversions that would have happened anyway. The gold standard is a geographic lift test: run ads in some regions and pause them in others, then compare conversion rates. Brand search campaigns often show low incrementality because those users would have found you organically. Incrementality testing is the most honest way to evaluate ad spend, but it requires enough volume to be statistically significant.

How do I calculate CAC?

Customer Acquisition Cost (CAC) equals your total marketing and sales spend divided by the number of new customers acquired in that period. Include all costs - ad spend, agency fees, tool subscriptions, and the salary cost of people running campaigns. A healthy business keeps CAC below one-third of customer lifetime value (LTV). Track CAC by channel to understand which sources deliver the most efficient growth.

Larry Kim captured the core challenge of customer acquisition economics in DTC e-commerce:

What is marketing mix modeling?

Marketing mix modeling (MMM) uses statistical analysis to estimate the impact of each marketing channel on overall business outcomes. Unlike pixel-based attribution, MMM accounts for offline channels (TV, radio, billboards) and external factors (seasonality, economic conditions). It answers questions like "what would happen if I shifted 20% of my TV budget to digital?" Large brands use MMM alongside digital attribution for a complete picture. Open-source tools like Google's Meridian have made MMM accessible to smaller teams.

What is multi-touch attribution?

Multi-touch attribution distributes conversion credit across all touchpoints in a customer's journey rather than giving 100% credit to the first or last click. Models include linear (equal credit to all touches), time-decay (more credit to recent touches), and data-driven (algorithmically weighted). No attribution model is perfectly accurate because they all depend on tracking the same user across devices and sessions. Use attribution as a directional guide, not an absolute truth.

Budget & Bidding

How do I set a PPC budget?

Start by identifying your target CPA and desired volume. If you want 50 leads per month at $40 each, you need at least $2,000 in ad spend. Add 20-30% for the testing and learning phase. Allocate budget by campaign based on priority and historical performance. Review spend weekly and shift budget from underperforming campaigns to winners. Google can overspend your daily budget by up to 2x on high-volume days, but balances it over the month.

What is CPC vs CPM vs CPA?

CPC (Cost Per Click) charges you each time someone clicks your ad - standard for search campaigns. CPM (Cost Per Mille) charges per 1,000 impressions - common for display and video campaigns focused on awareness. CPA (Cost Per Acquisition) charges per conversion, but most platforms implement it as a bidding target rather than a true pay-per-conversion model. Choose CPC for direct response, CPM for brand awareness, and target CPA when you have enough conversion data for the algorithm to optimize.

What is target ROAS bidding?

Target ROAS is a Smart Bidding strategy where you set a desired return on ad spend, and Google automatically adjusts bids to hit that target. If you set target ROAS at 400%, Google aims to generate $4 in revenue for every $1 spent. The algorithm bids higher for users likely to make large purchases and lower for those expected to convert at smaller values. You need at least 15 conversions with value data in the last 30 days for target ROAS to work effectively.

When should I increase my budget?

Increase budget when your campaigns are consistently profitable and limited by budget (check the "Limited by budget" status in Google Ads). Other signals: impression share lost to budget above 20%, and campaigns hitting daily limits before the day ends. Scale gradually - increase by 15-20% at a time and let the algorithm adjust for a week before evaluating. Sudden large budget increases can destabilize Smart Bidding algorithms.

What is impression share?

Impression share is the percentage of total eligible impressions your ads actually received. If your impression share is 60%, your ads appeared for 60% of the searches that matched your keywords and targeting. The gap comes from two sources: budget (you ran out of money) and rank (your Ad Rank was not competitive enough). Impression share lost to budget is fixable by spending more; lost to rank requires better Quality Scores or higher bids.

How do bidding auctions work?

Every Google search triggers an instant auction among advertisers targeting that keyword. Google evaluates each advertiser's bid, Quality Score, and expected extension impact to calculate Ad Rank. The winner gets position 1, second place gets position 2, and so on. You pay the minimum CPC needed to beat the Ad Rank of the advertiser below you, not your maximum bid. This means the actual CPC is often less than what you bid. Auctions happen billions of times daily and complete in milliseconds.

Shopping & E-commerce

What is Google Shopping?

Google Shopping shows product listings with images, prices, and store names at the top of search results. Shopping ads pull from your product feed in Google Merchant Center rather than keywords you manually select. Google matches your products to relevant searches based on your feed data. Shopping campaigns typically deliver higher ROAS than text search ads for e-commerce because users see the product and price before clicking, pre-qualifying themselves.

What is a product feed?

A product feed is a structured data file containing all the information about your products - titles, descriptions, prices, images, availability, and identifiers like GTIN or MPN. Google Merchant Center ingests this feed to power Shopping ads and free product listings. Feed quality directly impacts performance: accurate titles with relevant keywords, high-resolution images, and correct pricing are the biggest drivers of Shopping ad success. Most e-commerce platforms auto-generate feeds via apps or plugins.

What is Google Merchant Center?

Google Merchant Center is the platform where you upload and manage your product feed data. It connects to Google Ads to power Shopping campaigns and also enables free product listings across Google surfaces. Merchant Center validates your feed against Google's requirements and flags issues like price mismatches between your feed and landing page. Keeping your Merchant Center account healthy (no disapproved products, accurate shipping info) is a prerequisite for Shopping ad success.

How do I optimize Shopping campaigns?

Start with your product feed - optimize titles to include the most searched terms (brand + product type + key attributes), use high-quality images on white backgrounds, and ensure prices are competitive. Structure campaigns by product category or margin level so you can bid differently on high-value vs. low-margin products. Add negative keywords to exclude irrelevant searches. Monitor the Search Terms Report to understand what queries trigger your products and refine accordingly. MeasureBoard's Competitor Ads feature helps you monitor what your competitors are running in paid search.

What are free product listings?

Free product listings appear on the Google Shopping tab, Google Search, Google Images, and other surfaces at no cost. They were introduced in 2020 when Google opened its Shopping results to unpaid listings. You need an active Merchant Center account with an approved product feed. Free listings get less prominent placement than paid Shopping ads, but they provide incremental visibility and traffic. Every e-commerce store should claim this free real estate.

What is CSS (Comparison Shopping Service)?

A Comparison Shopping Service is a platform that can submit Shopping ads on behalf of merchants in Europe. After the EU antitrust ruling against Google in 2017, Google was required to allow competing CSS providers equal access to Shopping ad placements. Using a CSS partner can reduce CPC by up to 20% because Google applies a margin on its own CSS (Google Shopping) that third-party CSSs avoid. This applies only to European Economic Area countries.

Advanced Topics

What is programmatic advertising?

Programmatic advertising uses automated technology to buy and sell ad inventory in real-time, replacing manual insertion orders and negotiations. When someone loads a webpage, an auction happens in milliseconds to determine which ad appears. Programmatic covers display, video, native, and connected TV ads. It offers precise targeting and scale, but also requires vigilance against ad fraud and brand safety risks. The programmatic ecosystem involves DSPs (buy side), SSPs (sell side), and ad exchanges (the marketplace).

What is a demand-side platform?

A demand-side platform (DSP) is software that lets advertisers buy ad inventory programmatically across many publishers from a single interface. Major DSPs include Google DV360, The Trade Desk, and Amazon DSP. The DSP connects to ad exchanges and SSPs, evaluates available impressions in real-time, and bids on those that match your targeting criteria. DSPs are typically used by larger advertisers spending $10,000+ per month on programmatic, though self-serve options have lowered the entry barrier.

What is brand bidding?

Brand bidding means buying ads on your own brand name as a keyword. It is controversial because you may already rank #1 organically for your brand. Arguments for it: competitors can bid on your brand name and steal clicks; brand CPCs are typically very low ($0.50-$2); and it gives you more SERP control. Arguments against: you are paying for clicks you would have gotten for free. The right answer depends on whether competitors are actively bidding on your brand and how much organic real estate you already control.

Kirk Williams weighed in on the brand bidding debate when Basecamp's Jason Fried called out Google Ads:

How does AI affect PPC?

AI is fundamentally changing PPC management. Google's Smart Bidding uses machine learning to optimize bids across billions of signals. Performance Max automates creative, targeting, and placement decisions. AI-powered tools generate ad copy, analyze search term reports, and predict budget allocation. The PPC manager's role is shifting from manual bid adjustments and keyword selection toward strategic oversight - setting goals, providing quality inputs, and interpreting results. Advertisers who feed better data and creative into AI systems will outperform those who simply let defaults run.

What is ad fraud?

Ad fraud is any deliberate activity that generates fake ad interactions to steal advertising budget. Common types include click fraud (bots or competitors clicking your ads), impression fraud (ads loaded in invisible iframes), and conversion fraud (fake form submissions). Industry estimates put ad fraud losses at $80-100 billion annually. Google's built-in invalid click detection catches some fraud, but dedicated fraud prevention tools provide additional protection for high-spend accounts.

Kirk Williams noted a positive development on the ad fraud front when Google changed its parked domain policy:

What is connected TV advertising?

Connected TV (CTV) advertising delivers video ads through streaming services and smart TV apps like Roku, Hulu, and YouTube TV. CTV combines the impact of television advertising with digital targeting and measurement capabilities. You can target by demographics, interests, and even retarget website visitors with TV ads. CTV ad spend is growing faster than any other digital channel as viewers shift from cable to streaming. Google offers CTV inventory through DV360 and YouTube campaigns.

What is Performance Max asset reporting?

Performance Max asset reporting shows how each creative element (headline, description, image, video) in your PMax campaign performs, rated as Low, Good, or Best. Google evaluates assets based on their contribution to conversions when combined with other assets. Replace Low-performing assets and create more variations of Best performers. The reporting is less granular than traditional search campaign data, which is a common criticism of PMax - you cannot see exactly which asset combinations drove specific conversions.

What are broad match keywords in 2026?

Broad match in 2026 is drastically different from broad match five years ago. Google has expanded it to understand intent and context, not just individual words. A broad match keyword like "running shoes" can trigger ads for searches like "best sneakers for jogging" or "comfortable footwear for marathons." When paired with Smart Bidding, broad match gives Google's algorithm maximum flexibility to find converting searches you would never have thought to target. It works best with strong conversion tracking and sufficient budget for the algorithm to test and learn.