How Many Keywords for SEO

Why it matters

Choosing the right number of keywords per page directly affects how well a page ranks and how clearly it communicates its topic. Targeting too many unrelated keywords splits the page’s focus, making it harder for search engines to understand the primary intent. For example, a page that tries to rank for both "hair salon" and "photography studio" will satisfy neither audience. Conversely, a tight set of one primary and a few secondary keywords helps the page cover the topic naturally, reduces the risk of keyword stuffing, and aligns with what searchers actually want. Google’s guidance emphasises helpful content and natural language over exact keyword counts, so a page that reads well for humans tends to perform better than one optimised for a fixed number of terms.

Where it changes your decision

• Short, focused pages (e.g., product descriptions): stick to one primary keyword and one or two secondary terms to avoid clutter.
• Long, in-depth guides (e.g., 2000-word tutorials): you can include more semantic variations and related phrases because there is room to explain the topic thoroughly without repetition.
• Pages targeting multiple search intents (e.g., informational and transactional): split into separate pages rather than forcing all keywords onto one URL, to avoid keyword cannibalisation.

What it is not

• It is not a fixed rule like "use exactly 5 keywords per page" — the number depends on page length, topic depth, and intent.
• It is not about keyword density percentages — Google does not use density as a ranking factor, and forcing a specific percentage often leads to unnatural writing.
• It is not the same as LSI keywords — Google has confirmed it does not use LSI (latent semantic indexing) as a concept; instead, focus on semantic SEO and topical coverage.
• It is not a licence to repeat the same phrase many times — repetition beyond natural use can be seen as keyword stuffing.

Common mistakes

• Targeting too many unrelated keywords on one page: this dilutes topical focus and confuses search engines about the page’s main intent.
• Forcing exact-match keywords into every heading and paragraph: this makes the content read unnaturally and increases the risk of keyword stuffing.
• Using keyword density as the main optimisation target: density is not a ranking rule; prioritising it over intent and coverage harms readability.
• Creating near-duplicate pages for slight keyword variations: this wastes crawl budget and can cause keyword cannibalisation, where multiple pages compete for the same query.
• Ignoring search intent: a page that targets keywords without matching what the searcher wants (e.g., informational vs transactional) will not satisfy users or rank well.