EAT (Expertise, Authoritativeness, Trustworthiness.):
EAT is a factor of page quality rating for Google, and amongst one of the most important factors. Expertise refers to the content creator. Authoritativeness means having generally recognised authority. People know you, know your background, and look to you as a leader in your industry. They accept you as a good source of information. Finally, Trustworthiness means people can trust you to provide honest, true information that is accurate. The level of EAT required is not the same depending if the content is YMYL or not.