Honest feedback about the Facebook?

Hello. Tell me where you can see more detailed information about this company, is there a truthful source that you trust and can advise people?

What strategies would you recommend to effectively promote and increase engagement on Facebook? I am interested not only in methods of attracting new subscribers, but also in ways of creating content that can hold the attention of the current audience on a long-term basis. What advertising approaches on Facebook are considered the most successful in attracting attention and retaining user interest?