Google Ads is an auction. Every time someone searches, watches YouTube or opens a site in the Google Display Network, Google runs an auction among advertisers whose targeting matches. The winner is not simply the highest bidder: Google ranks ads by a combination of bid, expected click-through rate, ad relevance, landing-page experience and the context of the search. You pay only when someone clicks (on most search campaigns) — and usually less than your maximum bid.
For affiliates and performance marketers, Google offers the highest-intent traffic on the internet. It also has some of the strictest policies, so understanding both the mechanics and the rules matters.
How the auction decides who shows
Google calculates Ad Rank for each eligible ad. The main inputs:
- Your bid — set manually or by a Smart Bidding strategy.
- Quality — expected click-through rate, ad relevance to the search and landing-page experience. Google summarises these as a 1–10 Quality Score at keyword level.
- Ad Rank thresholds — minimum quality an ad must reach to show at all.
- Context — the search term, device, location, time and other signals.
- Assets — sitelinks, callouts and other extensions that improve the ad's expected impact.
Better quality lowers what you pay for the same position. That is why a relevant ad and a fast, useful landing page are not optional extras — they are cost savings.
The campaign types that matter in 2026
| Campaign type | Where ads show | Best for |
|---|---|---|
| Search | Google Search results | High-intent queries, lead gen, finance, software |
| Search with AI Max | Search, with broader query matching and generated assets | Advertisers ready to let Google expand queries |
| Performance Max | Search, Shopping, YouTube, Display, Discover, Gmail, Maps | Conversion goals across all Google inventory |
| Demand Gen | YouTube, Discover, Gmail | Visual, mid-funnel demand |
| App campaigns | Search, Play, YouTube, Display, AdMob network | App installs and in-app actions |
| Shopping | Shopping tab and results | E-commerce with a product feed |
AI Max for Search adds broader query matching and automatically generated text and URLs to a Search campaign. Performance Max buys across all Google channels from one campaign; Google added more channel-level reporting from late 2025, but you still get less control than with separate campaigns. If you need full control of landing pages — common for affiliates and compliance-heavy offers — turn off final URL expansion.
Smart Bidding and conversion tracking
Smart Bidding strategies (Maximise conversions, Target CPA, Target ROAS) use Google's machine learning to set a bid for every auction. They only work as well as the conversion data you feed them:
- Track the event that makes money — a qualified lead, purchase or deposit — not just a page view.
- Use enhanced conversions or offline conversion imports to send back conversions that happen later in your CRM or backend.
- For apps, send in-app events through Firebase or your MMP integration.
- Use Consent Mode where required (EEA, UK and other regions), so Google can model conversions when users decline cookies.
What affiliates need to know about Google's policies
Google allows affiliate advertising, but with conditions that catch many affiliates out:
- Destination requirements: landing pages must be functional, original and useful. Pages whose only purpose is to send users elsewhere — often called bridge pages — are disallowed.
- Unoriginal content: copying the advertiser's page or using thin, duplicate templates leads to disapprovals.
- Misrepresentation: fake scarcity, hidden fees, false claims of affiliation or celebrity endorsements lead to account suspensions.
- Restricted verticals: gambling, financial services, crypto, healthcare and dating require certifications or are limited by country.
- Trademarks: many advertisers ban brand bidding in their affiliate terms, independent of Google's own trademark rules.
- Circumventing systems: running multiple accounts to evade suspensions or cloaking (showing reviewers a different page from users) results in permanent bans.
Always read the current policy pages in the Google Ads Help Center before launching in a regulated vertical.
A sensible setup for a performance campaign
- Define the conversion and test it end to end before spending.
- Start with exact and phrase match on high-intent keywords, with a solid negative-keyword list.
- Write ads that match the search and send traffic to a page that delivers on the ad.
- Use Maximise conversions until you have enough data (often 30+ conversions a month), then set a target CPA or ROAS.
- Review search terms weekly; add negatives and new keywords.
- Test one big change at a time — bidding, landing page or ad — so you know what moved results.
Google Ads for app installs
App campaigns are largely automated: you provide text, images, videos and a target (installs or in-app actions), and Google places ads across Search, Play, YouTube and the AdMob network. Link Google Ads to your MMP or Firebase so in-app events flow back for optimisation. Our AppsFlyer setup guide covers the MMP side.
FAQ
Can I promote affiliate links on Google Ads?
Yes, if your ads and landing pages follow Google's policies and the advertiser's programme terms allow paid search. Thin bridge pages, direct linking where prohibited and trademark misuse are the usual reasons for disapprovals.
What is a good Quality Score?
Seven or above is generally healthy. Improve it with tighter keyword-to-ad relevance and a faster, more relevant landing page.
Is Performance Max good for affiliates?
It can work for advertisers with strong conversion data, but affiliates often need tighter control over landing pages, placements and brand terms than Performance Max allows. Many start with Search campaigns.
Why was my Google Ads account suspended?
The most common reasons are circumventing systems, misrepresentation, unacceptable business practices or suspicious payment activity. Appeal through the Help Center with evidence; do not open a new account to evade a suspension.
Sources
- Google Ads Help Center — policies (opens in a new tab)
- PPC Land — Google Ads API v21 introduces AI Max (opens in a new tab)
Published 25 October 2026 by the ClickSpero Editorial Team. Platform features, fees and policies change often — check the provider’s current terms before you rely on a number. Third-party names are trademarks of their owners; no endorsement is implied.