You can answer this like Let me explain you this with one example If Page A has an authority of 80, and Page B has an authority of 20, it’s obvious that Page A will be ranking higher in the SERP. However, if Page A links to Page B, Page A will now pass on some of its authority to Page B. Eventually, you’ll be seeing Page B’s authority and rankings start to rise too! So it can be said that it carries trustworthiness, relevancy, and authority of a site that is transferable through linking one page to another.