Keep an eye on Google Play policies
Before starting to talk about ASO, it is important to know who's the boss. Google has certain guidelines for apps and games that get published on Play Store. It is important to know the same, to allow users to download legitimate apps from the store, which are under the policy terms of Google Play. The details of the policy can be read at https://play.google.com/about/developer-content-policy/.
Get your app title right
Google Play Store allows the app name to be up to 30 characters. The algorithm understands the keywords in the title of the app in a better way than from any other source. This is the very reason you have to be very selective in choosing your keywords. The question to ask yourself is Does my app hint what the app could be doing? Using a keyword in the app title can be another way, but it depends, on a case-to-case basis. Take a look at keyword density patterns to understand what keywords will go with the title of the app.
For example, let's...