An inbound link is a link from another website to a page on your website.
An inbound link is composed of two parts:
The link to the page on your site, which is just the URL of your page
The anchor text, which is the text that is highlighted in the link that gets people to your site.
For example: Africa by Toto
“Africa by Toto” is the anchor text (and also one of the best songs ever made.)
The link is in the code behind the anchor text, pointing to https://www.youtube.com/watch?v=FTQbiNvZqaY.
Thus, this example is an inbound link for YouTube.