As you gain experience and exposure you’ll see people reach out and ask for help.
Many times, those who reach out for your help will ask for your help in areas where you are not an expert.
It is during these times that you need to tell the truth and say that you can’t help because you don’t know instead of trying to give them half baked information.
There can be many reasons for this behavior. Unwillingness to accept that you don’t know, a genuine concern for the person asking for help or pressure to help because some asked, and you don’t know how to say no.
Whatever be the reason, not helping is the best response because if you try to help people in areas where you don’t know enough, you may harm the person you are trying to help, or at the least waste their and your time.
So, avoid it.