Before you just do random exercises, take some time to learn about each muscle that you are going to work. This will help you understand how exercises target different muscles.
This program consists of 3 days; Push, Pull and Legs. It is commonly referred to as a PPL workout split. There are different workout splits but we are only focusing on the PPL split. There are 2 different ways you can use this workout split, as rest is important, you can do a less advanced 3 day split (Push, Rest, Pull, Rest, Legs, Rest, Rest) or a more advanced 6 day split (Push, Pull, Legs, Push, Pull, Legs, Rest).