On-page SEO checklist

On-page SEO is the set of choices you control directly on each page—as opposed to technical SEO (crawlability, site structure) or off-page factors like backlinks. Get these right on every page, not just the homepage.

Keyword & search-intent research

Each page is built around what real searchers are actually trying to accomplish, not just a phrase you'd like to rank for
Search intent behind a topic is understood before writing—someone searching to compare options needs a different page than someone ready to buy
Existing top-ranking pages for a target topic are reviewed to understand what searchers evidently expect to find there, not to copy them
One page is built to be the strongest answer for a given topic, rather than several thin pages competing with each other for the same search intent
Keyword research informs the topic and structure of a page; it never dictates unnatural, repeated phrasing stuffed into the copy

Title tags

Every page has a unique <title> tag—no two pages share the same title
The primary keyword or topic for the page appears naturally near the front of the title
Titles are descriptive and specific rather than generic ("Blue Wool Coats" beats "Products")
Titles are written for a human reader first, not stuffed with repeated keywords
Titles are a reasonable length so they don't get awkwardly truncated in typical search results

Meta descriptions

Every important page has a unique, written meta description—not a copy-pasted default
The description summarizes the page's actual content and gives someone a reason to click
No meta description is duplicated across multiple pages
Descriptions avoid clickbait that doesn't match the page's actual content

💡 A meta description doesn't directly affect rankings, but it's often what shows in search results—a weak one costs clicks even when the ranking is fine.

Headings & content structure

Each page has exactly one <h1> that describes what the page is about
Headings are used in a logical order (h1, then h2s, then h3s within those) rather than skipped or chosen for font size
Headings describe the content that follows them, not vague labels like "More Info"
Body content is organized into scannable sections rather than one long unbroken block of text

Images

Every meaningful image has descriptive alt text (empty alt="" for purely decorative images)
Image file names are descriptive rather than generic (navy-wool-coat.jpg instead of IMG_4821.jpg)
Images are compressed and appropriately sized for the space they're displayed in (see the image optimization checklist)

URL structure

URLs are short, readable and describe the page (/blue-wool-coats/ rather than /p?id=48291)
URLs use hyphens to separate words, not underscores or spaces
URL structure is decided early and kept stable—changing URLs after launch means setting up redirects
URLs avoid unnecessary parameters, session IDs or duplicate paths to the same content

Internal linking

Important pages are reachable within a few clicks from the homepage
Body content links to other genuinely relevant pages on the site using descriptive link text (not "click here")
Orphan pages—pages with no internal links pointing to them—have been checked for and fixed
Navigation menus reflect the site's actual priority pages, not just an alphabetical dump
Anchor text varies naturally across links to the same page rather than repeating one exact phrase every time, which reads as unnatural to both people and search engines
A reasonable number of genuinely relevant internal links appear in body content—enough to help navigation and topic understanding, not so many that the page reads as a link farm

Duplicate content & canonicalization

Near-identical pages (printer versions, tracking-parameter variants, staging leftovers) are consolidated with a canonical tag—see the technical SEO checklist
Content isn't republished verbatim across multiple pages of the same site purely to target slightly different keywords
Syndicated or cross-posted content links back to the original source, and the site doesn't rely primarily on content published elsewhere first

Social preview tags

Open Graph tags (title, description, image) are set so shared links look correct on social platforms and in chat apps
A dedicated social-share image is used where practical, rather than an undersized logo that gets awkwardly cropped
Social preview appearance has actually been tested by pasting a live URL into a platform's link-preview tool, not just assumed correct

Structured data

Relevant Schema.org structured data is added where it applies—Article, Product, LocalBusiness, FAQPage and so on (see the dedicated structured data checklist)
Structured data has been validated with Google's Rich Results Test or a Schema.org validator before launch
Structured data accurately reflects the visible content on the page—it isn't used to claim something the page doesn't actually say

Once on-page basics are covered, move to the crawlability and indexing side of things in the technical SEO checklist, and don't skip the content checklist—no amount of on-page tuning fixes thin or unhelpful content.