A backlink is a link that a website gets to one of its pages from another website. It is usually created when a website wants to refer to another website’s content for further explanation of its own content.
As it is a reference, that means the website owner who creates the backlink has some trust on the backlink target. After all, if you don’t feel confident about something, you won’t normally recommend it to other people, right? A backlink you create will make your content to become richer and provide a better experience to your content users.
There are several types of backlinks in its relation to SEO, such as dofollow, nofollow, sponsored, and UGC. From the four of them, dofollow backlinks are the most valuable in SEO although the other three can also add value.