On-page SEO refers to the process of optimizing individual web pages in order to rank higher and earn more relevant traffic in search engines. This is done by optimizing the content and HTML source code of the page. On-page SEO factors include things like title tags, meta descriptions, headings, and keyword usage and density.
Off-page SEO, on the other hand, refers to activities that are performed outside of the website to improve its position in search engine results pages (SERPs). This includes things like link building, social media marketing, guest posting, and influencer outreach.
In general, on-page SEO is focused on optimizing the content and HTML source code of a website, while off-page SEO is focused on promoting the website and building links to it from other websites. Both are important for the success of a website, and the relative importance of these factors may vary depending on the specific goals and audience of the website.