Essentially the goal here is to validate the problem before building an MVP.
Honestly, if you have [[Founder Market Fit]], you can probably skip this step and head straight to [[3. Scope & Plan MVP]].
If you do want to validate it (not really recommended), you might do things like create a landing page, run ads to it, and collect actual money (mostly for B2C). It's hard to validate B2B before you have an MVP.
#### Why you should skip this
Covered more in [[3. Scope & Plan MVP]] - but here's a great video explaining why [building a fast MVP](https://www.youtube.com/watch?v=QRZ_l7cVzzU) is the best thing you could do at this stage.