On-page SEO

What it means

On-page SEO is optimisation on the page itself: content matching search intent, the title tag, meta description, headings, internal links, images with descriptions and structured data. Unlike off-page factors, it is fully under the site owner's control.

The aim is for both search engines and people to understand quickly what the page is about, who it is for and what question it answers. A good page has one main topic, a clear heading structure and content that covers the topic in more depth and better than competing pages.

On-page SEO complements technical SEO, which deals with speed, indexing and site structure, and off-page SEO, which builds trust from outside. Without quality content on the page, however, neither technical perfection nor strong links will secure good rankings.

How it works in practice

Work begins with choosing a keyword and understanding user intent. If people want a definition, the page should open with a clear definition; if they want a comparison, it should compare. The title and meta description should contain the main topic and encourage clicks in search results.

A heading structure helps both readers and search engines. Internal links to related pages, for example between related entries in a glossary, strengthen topical connections and help search engines understand which pages matter most.

Images should have descriptive file names and alt text, and structured data help search engines display rich results. Content should be updated regularly, especially on topics such as tax or legislation, where information changes quickly.

What to watch out for

Keyword stuffing, hidden text or writing for search engines rather than people are outdated practices that now tend to do harm. Search engines understand synonyms and context, so natural, useful text works better than mechanically repeating phrases.

Several pages targeting the same topic can compete with and weaken each other. As a site grows, check that topics do not overlap and merge or clearly differentiate content where needed. Duplicate titles and descriptions are another common mistake.