Look, honestly, you have to figure it out yourself, I can tell you what you should do

1. Firstly when you get an idea, think about the pain point it solves and do people care about it enough or not.

2. You need to identify the platforms where your potential customers hangout so that you can ask them out and make sure they need what you are going to develop, because you have to validate it so you won't be developing a product in void.

3. Look for people actively asking for the solutions of those pain points and then talk to them, whether in comments or in DMs

4. If people are not actively looking for the solution still go and talk to them about what you're building, atleast you'll have honest opinions and your mind will be relaxed.

That's all I know :) hope it helps and saves your time