What is RankBrain?
SEO Definition and Examples
RankBrain is a Google AI algorithm that understands the meaning of search queries and pages, even with new words, ranking 3rd after links and content.
Full Definition: What is RankBrain
RankBrain is a machine-learning algorithm Google uses to understand the search intent of a query and match it to relevant pages. Before RankBrain: "SEO" ≠ "search engine optimization"; Google had to see the exact words. RankBrain: Google understands that both have a similar meaning. RankBrain is responsible for interpreting ~15% of new queries (that have never been searched before).
Why Does RankBrain Matter for SEO?
RankBrain is Google's 3rd ranking factor (after links and content). Impact: good content + natural keywords (no keyword stuffing) ranks better. Pages with high engagement (long dwell time) rank better — RankBrain sees that users are satisfied.
Source: Google — RankBrainFrequently Asked Questions about RankBrain
Related Terms
Keyword Research
BeginnerKeyword research is identifying the words and phrases your target audience searches for on Google, so you can create content that answers those searches.
AI SEO
AdvancedAI SEO = optimizing content to be cited by AI assistants (ChatGPT, Claude, Gemini) and to appear in AI-generated answers. Different from traditional Google SEO.
Engagement Metrics
IntermediateEngagement metrics (dwell time, bounce rate, pages per session) measure how engaged users are on your page. High engagement = a positive ranking signal.
SERP (Search Engine Results Page)
BeginnerThe SERP is the results page Google shows after a search, including organic results, paid ads, featured snippets, the Local Pack and other special formats.
Put RankBrain into practice
Explore how to apply this concept to your industry and city.
