What is the ruling on subscribing to the Google AdSense advertising program, given the presence of filtering for websites that violate Sharia and the possibility of some undesirable ads appearing due to the inability to fully control them, and is the money earned from it lawful?

I have reviewed the fatwas published regarding the "Google AdSense" program and the ruling on dealing with it, and you may have noticed a difference among them. The reason for this is that those who ask questions mention different things about it. Websites change their systems and programs, introducing new conditions or programs, or removing some, which leads to a difference in the ruling based on these changes.

As for what you mentioned in your question about working with the aforementioned site through displaying advertisements, the answer is: As long as the site allows its users to block what they do not want to display, filter advertisements, and delete what they do not want, and only a rare minimum of these objectionable things slips through, then there is no harm in dealing with it and earning from displaying permissible advertisements. Those who view the advertisements must lower their gaze from what is impermissible. If one finds a permissible and unambiguous work other than this, it is preferable for them to switch to it.