The design of Game Hello Neighbor Hints is simple: when you open the app, you'll see a list with seven entries where you'll find all the tips and descriptions to help you advance in the game. When you tap on any of the sections, you'll open up a tip. After you're done reading it, to continue expanding your know-how, you have to tap the 'back' button and choose another tip to study.
The advice found in the app is along the lines of 'if your neighbor catches you sneaking into the house, you'll have to return home and try again,' and 'the player's task is to break into the neighbor's home' etc. As you can see, you won't find any revolutionary secrets, but it does serve as a description of the game so you know what you have to do and what's best to watch out for.