In this recipe, we are going to take a look at deciding who can use Lightning Experience, how custom profiles are going to be used to get work done, how custom permission sets are going to be used, and how to handle a System Admin, as well as the other standard profiles, using these custom profiles and custom permission sets. We have already understood that all these standard profile users are automatically enabled with Lightning Experience. Let's understand each one in detail. Lightning Experience is not to be given to just one user. We have to understand that we already had another user enabled with Lightning Experience.