A page's relevance to a topic isn't just about matching a phrase — it's about whether the content, taken as a whole, genuinely and comprehensively addresses that subject.
Relevance Is Evaluated Across the Whole Page
Search engines assess the overall context and depth of a page's content, not just whether a specific phrase appears somewhere on it.
Related Terms Reinforce the Page's Actual Subject
A page that naturally includes the vocabulary associated with its topic gives search engines a much clearer, more confident signal of what it's actually about.
Thin Content Struggles Even With the Right Keyword
A page that mentions the target phrase but lacks any of the related depth a real treatment of the topic would include often underperforms despite technically matching the query.
Next step: Use the LSI Tool to check whether your content includes the related terms that reinforce genuine topical relevance.