Also known as: On-Page SEO, On-page optimisation, On-site SEO
On-page SEO covers all optimisations that take place directly on a web page — in other words, everything the site operator controls entirely themselves: content quality, HTML structure, heading hierarchy, meta tags, internal linking, URL structure, image optimisation, page speed, Schema.org markup, mobile friendliness. Its counterpart is off-page SEO — everything outside your own website (backlinks, brand mentions, external reputation).
15 points for a quick page assessment: (1) Exactly one H1 containing the main keyword. (2) Clean H2/H3 hierarchy without skipped levels. (3) Title of 50–60 characters, keyword at the front. (4) Meta description of 140–155 characters with a CTA. (5) URL short, descriptive, without parameters. (6) Images with meaningful ALT tags. (7) At least three internal links to topically related pages. (8) Canonical tag set. (9) Mobile rendering without layout shifts. (10) LCP < 2.5 s. (11) Schema.org markup according to page type. (12) Answer to the main question in the first H2 section (for featured snippets and GEO). (13) FAQ section for guide content. (14) Recency note for time-critical topics. (15) Clear CTAs and conversion paths.
Classic on-page optimisation and GEO overlap by roughly 70%. Both benefit from a clear H2 structure, factually supported statements, Schema.org markup, entity completeness and a clean heading hierarchy. The key GEO addition is the citability lens: answer one concrete question per H2 section, within the first 40–60 words. Anyone who does on-page SEO consistently builds GEO visibility almost as a by-product.
Example: A travel magazine spends 80% of its SEO budget on backlink acquisition and only 20% on on-page work. After 12 months, visibility stagnates. Switching to 70% on-page (heading refactoring, Schema.org, internal linking, FAQ sections, page speed optimisation) and 30% off-page: after 6 months, visibility is up 180%, without the number of backlinks having risen appreciably — the leverage lay in the site itself.
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