what is inbound and outbound link in seo?

An inbound link is a hyperlink back to your site from another Web site. The one constant and reliable strategy in search engine optimization is that sites with a variety of high quality backlinks rank higher in the search engine results pages.

Outbound links are links that are meant to take you elsewhere. These are links that are going to direct you to another specific webpage or website altogether. Most, if not all, websites have outbound links. Two sides of a coin.