This is when one website hyperlinks to another website using html href code. Backlinks are a major factor used by Google in determining organic rankings. The basic idea being that if “website A” has incoming backlinks from other strong/relevant websites (websites B, C, and D), the links are votes of trust for website A. Website A will then gain authority from B, C, and D through those backlinks, which generally results in better rankings and a source of potential referral traffic.
This can sometimes be referred to as an “Inbound link.” A backlink is almost a cross-reference of sorts – search engines see it as a good indicator of how popular a site is because of how many other sites are linking to it.
This is a link that directs users from another website to your page and is a part of SEO Linkbuilding. It's an incoming line from an external website to another website. Collecting quality backlinks is one of the facets of search engine optimization (SEO), as they are one of the determining factors of a page’s relevancy, popularity, and/or importance.