Imperatives are used to tell someone to do something, but there are several different situations in which you can use imperatives.
Use imperatives to give commands, especially when the situation is unexpected or urgent.
Directions and Instructions
Use imperatives when giving instructions or directions for how to do something or how to get somewhere.
Offers and Requests
Use imperatives when asking for something or making an offer. We can add 'please' to an imperative sentence to make it less demanding. This is often good when you want to be polite to someone.