Links that are pointing from one website to other website. Links can be of two types 1) inbound link 2) outbound link.
1)Inbound Link or backlink is the link pointing to your website from other website.
2) outbound link or external link is the link pointing to other website from your site.
An inbound links or we can say backlink is a hyperlink on a third party website which redirects to webpage on your website. and The outbound or external links are hyperlinks that point at any domain other than the domain the link exists on.
An inbound link (also referred to as a back link) is a hyperlink on a third-party web page that points to a web page on your site.
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. There are two (2) kinds of outbound links.