On-page SEO: the complete checklist

On-page SEO is everything you control on the page itself.

The essentials

  • Title tag: unique, with the main keyword near the start, about 50–60 characters.
  • Meta description: a clear summary of 120–160 characters that invites the click.
  • One H1 that states the topic, then H2 and H3 headings in order.
  • URL: short, readable, with words not numbers.
  • Content: answers the search fully, with the main and related keywords used naturally.
  • Images: compressed, with descriptive alt text.
  • Internal links to and from related pages.
  • Structured data where it fits: articles, products, FAQs, organisation.

Check a page in one go

The website SEO audit checks all of these on a single page and tells you what to fix. For a whole site, run a site audit in a project.

A worked example

A product page for an RO purifier before and after:

  • Title: "Product 4821" → "RO 7-Stage Water Purifier 8L | Pepplo Demo Store".
  • Description: missing → a 150-character summary with stages, capacity and free installation.
  • H1: missing → "RO 7-Stage Water Purifier".
  • Content: three lines → benefits, specification table, FAQ about filters and warranty.
  • Images: 4 MB photos with no alt text → compressed WebP with descriptive alt text.
  • Links: none → links from the purifier category page and the filter-change guide.

Priorities when time is short

Fix titles and H1s first, then content depth and internal links, then descriptions, images and structured data.

Templates

Many on-page problems come from page templates. Fix the template once, for example to output a unique title and H1 from the product name, and every page improves.

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