As explained in question 13, permission sets are collections of settings and permissions that give users access to various tools and functions without changing their profile or requiring multiple profiles for users who perform different tasks across apps in your org. Permission sets are useful when a user is part of a team with an assigned profile that covers the majority of their needs but requires more access than the rest of their team for some specific tasks or functions. For example, a user may need access to a custom object or field that is not available to their profile, but only for a limited time or project. In this case, assigning a permission set to the user can grant them the additional access they need without affecting their profile or other users with the same profile. References: https://help.salesforce.com/s/articleView?id=sf.perm_sets_overview.htm&type=5