“Formal expertise is important for YMYL topics such as medical, financial, or legal advice. “, QRG, p. 26.
Nevertheless, practical life experience is not ignored. This is especially important beyond the YMYL pages.
“If it seems as if the person creating the content has the type and amount of life experience to make him or her an “expert” on the topic, we will value this “everyday expertise” and not penalize the person/webpage/website for not having “formal” education or training in the field. “, QRG, p. 20.
Google even considers personal experiences if these correspond to the search intent.
“For example, there are forums and support pages for people with specific diseases. Sharing personal experience is a form of everyday expertise “, QRG, p. 20