To what extent is earning profit from online advertisements permissible?

The permissibility of earning from advertisements varies depending on the advertisement itself. If an advertisement is free from anything forbidden by Islamic law, such as pornography or the promotion of prohibited things (like usury or alcoholic beverages), then there is no objection to the participant receiving what is given to them by advertisers or companies. This is because opening emails and reading advertisements is intended by their owners, and it provides them with the benefit of publicity and marketing.