I've heard a lot of advice for founders to build a landing page as an MVP in order to collect e-mail addresses and validate an idea. But I'm sure there's more to the process than this. If I'm trying to build a consumer product, how should I go about sharing it? How many e-mails do I need before it's validated? What do you do once you have those e-mails?These are just some of the thoughts and questions I had. I'm skeptical that a landing page alone can do much since it isn't really solving a problem for the user.