Off page and On page SEO
On-page optimisation (on-page SEO) is what can be done on the pages of a website to maximise its performance in the search engines for target keywords related to the on-page content.
Off-page optimisation (off-page SEO) is what can be done off the pages of a website to maximise its performance in the search engines for target keywords related to the on-page content and keywords in off-page direct-links.