How to do proper market research?

I am working on an idea and i want to figure out if there is a market or if there is a specific need for my idea.

I came to that idea because i was looking for that kind of a solution (so i also want to help myself with that idea). But how can i find out if there is a need?

Just googling the keywords and find out if there is already an app? Just find one or two statistics? Is there a more professional way of market research?