"Frag ab" is a German idiom that means "ask" or "pose questions". It is an invitation or instruction for someone to ask questions in order to gather information. It can be used to prompt someone to conduct a survey, interview, or complete an examination.
For example, "Frag ab, was die Leute denken" (Ask what people think). In this case, the person is encouraged to find out people's opinions through a survey or interview.
Or "Frag ab, bevor du eine Entscheidung triffst" (Ask before making a decision). Here, the person is instructed to gather information before making a decision by asking questions to experts or other relevant individuals.
It can also be interpreted as a command to inquire about specific information, ask a specific question in a survey, or generally conduct a survey.