On-page SEO is a method of optimizing your webpages to improve their rankings in organic search results and attract more traffic from search engines.
It includes everything you do on your pages themselves, like writing super relevant content with keyword-rich headings, linking to other pages internally, and giving your images descriptive file names.
Basically, on-page SEO is all about making your pages relevant, useful, and easy to understand for both humans and search engine bots.
On-page SEO is one of the major pillars of any SEO strategy. Together with off-page and technical SEO tactics like improving website speed, building backlinks, and adding schema, it can help you significantly improve your search rankings and organic traffic.