Definition
The Search Quality Rater Guidelines are a lengthy public document Google gives to the external people it contracts to evaluate search results. Raters do not change rankings directly; they score sample results on criteria like how well a page meets the query's need and the page's overall quality (expertise, trust, purpose, effort, accuracy), and their aggregated judgements are used to test and train Google's ranking systems.
The guidelines are the closest thing to an official description of what Google considers high and low quality.
Key concepts from the document include Page Quality (with E-E-A-T and "lowest quality" characteristics like deceptive purpose or inadequate expertise on YMYL topics), Needs Met (how well a result satisfies the searcher), and a strong emphasis on the page's purpose and on whether it was created to help users or primarily to rank or profit.
In context
For an iGaming affiliate, the rater guidelines are effectively a checklist for what will and will not survive quality-focused algorithm updates in a YMYL niche. The document's "low quality" markers map directly onto common affiliate failings: pages with a primarily monetising purpose and little user value, inadequate expertise on a topic that affects people's money, deceptive or hidden intent (a ranked list that is actually sold), unsourced or inaccurate claims, and distracting or obstructive ad and interstitial experiences.
Its "high quality" markers map onto the opposite: a clear beneficial purpose, demonstrated experience and expertise, accuracy, effort and originality, and trust signals like transparency and good reputation.
Used as a self-assessment tool, the guidelines tell an affiliate what to fix: give every commercial page genuine evaluative value and first-hand testing, put credentialed named authors behind YMYL content, make the review methodology and any paid placements transparent, verify and date factual claims, keep the ad and interstitial experience light, and ensure the site's overall purpose reads as helping readers choose safely rather than as maximising clicks. A large, accurate, bylined glossary is a positive Page Quality signal by these criteria.
The guidelines are not a ranking algorithm, but building to them is the most reliable way to align with what Google's quality systems are trained to reward.
Worked example
An affiliate reviews its site against the rater guidelines' low-quality markers and finds several: monetising-first thin pages, no author expertise on money-affecting topics, and a sold toplist presented as editorial. It addresses each - adds testing and value, credentialed authors, and a transparent methodology with labelled sponsor slots - ahead of the next quality update.
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Frequently asked questions
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