On-page SEO checklist: what to check before you publish

Check these first; they determine whether the page can compete at all.

One H1 that names the topic in natural language. H2s that follow the questions a reader asks, in a logical order without skipping levels. A direct answer in the first one or two sentences. Sections that are self-contained enough to quote. Original detail: an example, data, a screenshot, or a first-hand observation. Accurate facts with dates and sources where they matter. No filler written to hit a word count.

Link to two to five closely related pages on your site with descriptive anchor text, and add links to the new page from at least two relevant existing pages and its hub. Link out to authoritative sources for claims. Give images descriptive file names and alt text, set width and height to prevent layout shift, and compress them. Use HTML tables for comparisons rather than images of tables.

Main content appears in the server-rendered HTML. No noindex tag or header, and the URL is not blocked by robots.txt. Structured data matches the content type, such as Article, Product, or BreadcrumbList, and validates in the Rich Results Test. The page loads quickly on mobile. The URL is added to the sitemap with an accurate lastmod.

Run URL Inspection's live test, request indexing for important pages, and record the publish date for later measurement. Check Search Console after two to four weeks for impressions and queries. On serionflow.com, most of these checks run automatically in the build: titles, canonicals, structured data, word and heading floors, and internal link validity, so a page that fails cannot ship. Our free title tag, meta description, H1, and canonical checkers cover the same ground for a single live page. SerionFlow is the wrong tool for auditing pages you already have; it applies these checks to new pages before publishing.