On-page SEO works best when it is treated as a quality-control process, not a box-ticking exercise. Google’s current guidance focuses on helpful, reliable, people-first content, while also recommending that important words appear in prominent places such as the title, main heading, alt text, and link text. It also expects pages to be internally linked so they can be found and understood.
That means a modern on-page SEO checklist should not be built around old myths like “hit 3 to 5% keyword density” or “every page must be long to rank”. Instead, it should check whether the page is clear, relevant, crawlable, useful, and easy to interact with.
What this checklist is for
Use this checklist to review whether a page is ready to publish or whether an existing article needs improvement. It covers the core on-page elements that affect how search engines interpret a page and how users respond to it: content quality, headings, meta tags, URL structure, images, and internal linking.
Core on-page SEO checklist
- The page has enough original content to satisfy the query. As a practical minimum, aim for at least 300 words, but write as much as the topic genuinely needs. Thin pages rarely compete well unless the intent is very narrow. Google’s emphasis is on usefulness, not arbitrary length.
- The content is built around a clear target keyword and search intent, with related terms used naturally throughout the page.
- The page has one visible H1 only, and it appears near the top of the main content.
- The body copy is structured with H2 to H4 headings where needed, and each section has a clear headline.
- The title tag is filled in, unique, relevant to the page, and ideally sits in the 30 to 70 character range. Google uses title links in search results but may rewrite them, so clarity matters.
- The meta description is filled in, unique, relevant to the page, and ideally sits in the 120 to 160 character range. Google may use it as the snippet if it better matches the query and page content.
- The URL is short, readable, and descriptive, with hyphens between words and no unnecessary parameters or symbols.
- Images include useful, descriptive alt text that reflects the image and, where relevant, the page topic. Google recommends descriptive alt text and relevant filenames.
- Images are compressed and sized appropriately for the page layout to support better loading performance.
- The page is internally linked from at least one other relevant page, so it is not orphaned.
- The page links to other relevant internal pages where it helps users continue their journey.
- The content is unique, not copied, not spun, and not duplicated across multiple weak pages targeting tiny keyword variations.
- The page layout is easy to scan, with short paragraphs, subheadings, and supporting visuals where useful.
- The page loads quickly and works properly on mobile devices.
How to think about each element
Content quality comes first
A page can have perfect tags and still fail if the content is weak. Google’s own guidance is very clear that content should be created to help people, not to manipulate rankings.
That changes how content analysis should work. Instead of asking, “Did we use the keyword enough times?”, ask:
Does the page answer the query clearly?
Does it add something useful?
Does it feel trustworthy and complete?
Does it deserve to rank over what is already there?
Longer content can perform well because it often covers a topic more thoroughly, but length is not the ranking factor on its own. Coverage, clarity, and usefulness matter more.
Headings should create structure, not decoration
The H1 is the page headline. H2s and H3s should break the article into logical sections that help readers and search engines understand what comes next. Google specifically recommends placing the words people use to search in prominent places like the title and main heading.
That said, headings should never be stuffed with awkward keyword repeats. Use the main phrase where it makes sense, then use related language naturally in supporting headings.
Title tags and meta descriptions should earn the click
The title tag helps search engines and users understand the page topic. The meta description helps persuade users to click. Google may rewrite either element in search results, but that is not a reason to leave them blank. A strong title and description still give your page the best chance of presenting well.
A good title tag is clear, specific, and relevant. A good meta description quickly explains what the page offers and why it is worth visiting.
URLs should be clean and human-readable
Short, semantic URLs are easier to understand and easier to maintain. Use real words, keep the structure simple, and avoid hashes, cluttered parameters, or random strings where possible.
A good URL usually mirrors the page topic, not the entire category history of the CMS.
Image SEO is partly about search, partly about experience
Google recommends descriptive alt text and says it uses information from page content, captions, titles, and alt text to understand images.
For content analysis, that means checking two things:
The image helps the page, and the image is described properly.
Alt text should describe the image in plain language. It should not be auto-generated from headings, duplicated across every image, or stuffed with keywords.
Internal links stop pages from becoming invisible
Google recommends making links crawlable so it can find other pages on your site. If a page is orphaned, it is harder for search engines and users to discover, and it often underperforms as a result.
Every important page should be linked from at least one relevant existing page. Stronger pages should also pass context and authority to supporting pages through internal links.
What to stop doing
A modern on-page SEO review should move away from outdated rules. The biggest ones to drop are fixed keyword-density formulas, pages built for every tiny keyword variation, and copy written primarily for search engines instead of users.
There is no universally correct keyword density. Use the target phrase naturally in the title, H1, opening copy, and where relevant in the body, then write like a human. Keyword stuffing still harms quality, and low-value duplicate pages are exactly the kind of content Google has spent years trying to suppress.
Final takeaway
A strong on-page SEO checklist is really a content quality checklist with technical discipline built in. The goal is not to force every page into a rigid formula. The goal is to make sure every page is clear, useful, structured, and easy for both users and search engines to understand.If you want, I can turn this into a branded SEO Creative page template with fixed sections for H1, meta title, meta description, URL, headings, image alt text, and internal-link notes.
