The parameters used by Google

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Expertise refers to content creators considering the credibility of the publisher or website.

For example, there is someone who does not have a health industry qualification but creates a blog about the theory and diagnosis of a certain disease. Content like this is clearly difficult to rank number one on the search engine page.

It is a different matter if the person who creates health content is a doctor rcs database who has a personal blog, a health or academic institution in the medical field, or a medical check-up service provider.

Content about health or disease that is reviewed by people who are truly experts in their field tends to be easier to rank number one. That is why expertise in a topic is very important.

3. Authoritativeness
To assess whether content has clear authoritativeness and validation are the relevant sources used, whether from journals, official websites belonging to the government or related ministries, or opinions from expert practitioners.