Google’s Search Quality Rater Guidelines emphasize a great deal on the concept of E-A-T, short for expert, authoritative and trustworthy. Sites that don’t demonstrate these signs are seen as lower quality, while those that are seen as high on E-A-T are rewarded accordingly. The more popular and authoritative a website is, the better weightage is given to links from that site. To build your own credibility, you need links from websites that show the qualities of EAT.