Also known more plainly as a “link”, this is when one website hyperlinks to another website using html href code. Backlinks are used by Google in their SEO ranking factors, with the basic idea being that if “website A” has incoming backlinks from other strong websites (websites B, C, and D), the links are votes of trust for website A, and website A gains some authority from B, C, and D through the links.
Source: HSMAI CHDM Study Guide
