Asking for opinions or suggestions; 'how about', 'what do you think of'.
Noun + は/が + どうですか, Verb-casual + の + どうですか, い-Adjective + どうですか, な-Adjective + な + どうですか
Long explanation:
The ~どうですか grammar point is used to ask for someone's opinion or suggestion on something. It can be translated as 'how about' or 'what do you think of' in English. This expression is neither casual nor formal and can be used in various situations.