How Many SEO Keywords Per Page Should You Use?
The right number of keywords per page depends on your topic, not an arbitrary count. Learn how many primary and secondary keywords to target, and why topic-first writing outperforms keyword stuffing every time. Similar AI's agents put these principles into practice for e-commerce retailers.
How many keywords should you optimize for?
“Use your primary keyword 5 times and keep density at 2%” keyword density is no longer considered a meaningful ranking factor
“One primary keyword plus 2-5 secondary keywords per page, woven naturally into your content”
“Cover the topic thoroughly so the right keywords appear naturally”
RVshareKleinanzeigenThe Best Number of Keywords for SEO Per Page
How many keywords should you use? The short answer: one primary keyword and a small cluster of secondary keywords. Here's why that works better than chasing a magic number.
One Primary Keyword Per Page
Every page should be built around a single primary keyword that represents its core search intent. This is the one primary keyword per page SEO best practice that keeps your content focused and prevents your own pages from competing against each other. When choosing how many main keywords should be chosen for a page, start with one clear primary target.
2-5 Secondary Keywords Per Page
Secondary keywords are closely related terms, long-tail variations, and subtopics that reinforce your primary keyword. For example, if your primary keyword is “women's running shoes,” your secondary keywords might include “trail running shoes for women” and “lightweight women's running sneakers.” These secondary keywords in SEO help search engines understand the breadth of your content.
Topic Coverage Beats Keyword Counting
Search engines now use language models to understand what a page is about. They don't count how many times you say “running shoes”. They understand that cushioning, pronation, and trail vs road are all part of the running shoe topic. All else being equal, a page that covers the topic well will typically outrank one that repeats the same phrase.
Primary vs Secondary Keywords: What's the Difference?
Understanding the distinction between primary and secondary keywords is essential to knowing how many keywords to target per page and how to structure your content.
Primary Keywords Define the Page
Your primary keyword is the single most important search term for a given page. It belongs in your title tag, H1, URL, and meta description. Each page on your website should have its own unique primary keyword to avoid using the same keywords on multiple pages, which causes keyword cannibalization.
Secondary Keywords Add Depth
Secondary keywords are the supporting cast. They include synonyms, related questions, long-tail phrases, and subtopics. These secondary keywords should appear naturally in subheadings, body text, image alt tags, and product attributes. They help your page rank for a wider range of queries without forcing multiple keywords on one page.
Example: Keywords Per Page Breakdown
Here's how you might structure keywords for a “women's running shoes” category page:
women's running shoes
- • best running shoes for women
- • women's trail running shoes
- • lightweight women's running sneakers
- • cushioned running shoes for women
sizing, pronation, arch support, trail vs road, price ranges
How Many Keywords Should a Category Page Target?
Category pages should be built around one primary topic and its naturally related subtopics. Here's how to approach keyword targeting without falling into the counting trap.
Answer Questions, Don't Count Keywords
Your primary keyword is the single term that best represents the search intent of your page. It belongs in the title tag, H1, URL, and the first paragraph. If a page tries to rank for two unrelated primary keywords, it often ends up ranking for neither.
The Right Keywords Appear Naturally
When you write about cushioning, pronation, trail running, and breathable materials, you're naturally using many of the words people search for topic-first writing tends to capture relevant search terms, though keyword research can still help identify terms you might otherwise miss.
Example for a “women's running shoes” page:
- • Primary: women's running shoes
- • Secondary: best running shoes for women
- • Secondary: women's trail running shoes
- • Secondary: lightweight running shoes women
- • Secondary: running shoe size guide
What Good Topic Coverage Looks Like
A well-covered category page naturally includes language from across the topic, not because you placed it deliberately, but because you wrote something useful.
How Many Keywords Should I Use on Product Pages?
Product pages should focus on one primary keyword (the product name or type) and naturally include secondary keywords through thorough, helpful descriptions.
Describe What It Is
Category pages should target one primary keyword (the category name) plus several secondary keywords covering product types, attributes, and shopper questions.
- • 1 primary keyword (category name)
- • 3-5 secondary keywords (subtypes, features)
- • Cover product attributes and use cases
- • Include practical details like sizing and price ranges
Explain Who It's For
Explain who benefits from this product and in what situations. This connects the product to the searches real people make and brings in secondary keywords naturally.
- • 1 primary keyword (product name + type)
- • 2-4 secondary keywords (features, materials)
- • Describe what it is and who it's for
- • Include specs, compatibility, and care details
Include What Buyers Search For
A product page that honestly and thoroughly describes the product will naturally contain many of the words people search for.
- • 1 primary keyword (main topic)
- • 3-8 secondary keywords (related questions)
- • Use secondary keywords in H2s and H3s
- • Answer related questions naturally
Avoid Using the Same Keywords on Multiple Pages
A common mistake is targeting the same primary keyword across multiple pages on your website. This creates keyword cannibalization, where your pages compete against each other in search results and none of them rank as well as a single focused page would.
What to Avoid
- • Multiple pages targeting the exact same primary keyword
- • Duplicate content across similar category pages
- • Spreading the same topic thin across many pages
- • Forcing too many keywords onto a single page
What to Do Instead
- • One unique primary keyword per page
- • Each page covers a distinct topic or intent
- • Use internal links to connect related pages
- • Let secondary keywords overlap naturally between pages
How Similar AI's Content Agent Handles Keywords Per Page
The Content Agent generates and optimizes page content by assembling product data, search demand signals, and category structure as context using LLMs more like a summarization engine than a keyword-stuffing tool, choosing the right primary and secondary keywords automatically.
Topic Understanding, Not Keyword Insertion
The Content Agent uses context engineering accessing products on the page, ranking keywords, and first-party data to generate relevant, contextual content for each page. It writes in natural language that reads well for shoppers, using the primary and secondary keywords that naturally belong on the page.
- • Understands the full topic, not just the head term
- • Selects appropriate secondary keywords automatically
- • Writes content that helps shoppers make decisions
- • Natural language that reads well to humans
Works Across Your Whole Catalog
When you have thousands of category and product pages, the Content Agent generates contextual content for each one using real product data and attributes differentiating from template-based approaches that repeat the same generic copy everywhere.
- • Each page covers its own distinct topic
- • No thin, duplicated content across similar categories
- • Useful, specific information on every page
- • Consistent quality across your entire catalog
What the Content Agent Does
How Many Keywords Should a Website Have?
The total number of keywords for your website depends on how many distinct products, categories, and topics you serve. Here's how our agents help you cover all of them systematically.
Similar AI's Topic Sieve
Similar AI's Topic Sieve filters candidate topics to determine which new category pages are worth building, discarding those that lack sufficient search demand, product coverage, or revenue potential, so every page in your catalog targets a distinct set of primary and secondary keywords without overlap.
Similar AI's New Pages Agent
The New Pages Agent creates optimized category pages with schema markup, internal links, and auto-matched products. Its Topic Sieve sub-agent first evaluates gaps in your catalog by cross-referencing search demand with your product catalog, so new pages target topics where shopper demand exists but no page currently serves it.
Similar AI's Linking Agent
The Linking Agent automatically builds data-driven internal links across your site through multiple specialized strategies powered by GSC data, SERP similarity analysis, crawl data, and revenue signals, reinforcing how many keywords your site can rank for by strengthening topical authority.
Frequently Asked Questions About SEO Keywords Per Page
How many keywords per page for SEO?
Most SEO experts recommend targeting one primary keyword and two to five secondary keywords per page. This ensures your content stays focused on a single search intent while naturally covering related terms that reinforce topical relevance.
How many keywords should I use for SEO?
There is no universal number, but a practical guideline is to focus on one core topic per page supported by a handful of related secondary keywords. The key is covering the topic thoroughly rather than hitting a rigid keyword count.
How many keywords to use for SEO across a website?
Your total keyword count depends on how many distinct topics your site covers. Each page should target its own unique primary keyword so pages don't compete with each other, and secondary keywords should be distributed naturally across relevant pages.
What is the difference between primary and secondary keywords?
A primary keyword is the main search term a page is built around, representing the core intent you want to rank for. Secondary keywords are closely related variations, long-tail phrases, and subtopics that support the primary keyword and help search engines understand the full scope of your content.
Get the Right Keywords on Every Page
Similar AI's agents work together to generate and optimize page content using product data and search demand signals, build internal links, and identify the right pages to create targeting the right primary and secondary keywords naturally across your catalog. No keyword stuffing, no thin pages, just useful content that ranks.