App immerses users in brand education through gamification.
It's a very broad question because this depends on the industry, where your audience is, their demographics, etc. But I think a general answer would be word of mouth. If it is your product, start hitting events and visiting potential customers, offer them a 5 minutes presentation on why they need to use your product. Make that all day every day and you will get your firsts users and your first feedback to improve
