Roles are database-level security principals that determine how permissions are handled across the operating environment. They are capable of managing access and providing protection to mission-critical data. They can be used to define whether a user has the ability to create, modify, execute and read objects themselves. They can even be allowed to manage permissions, or of course be prevented from doing so. This is achieved through permissions, which can be assigned to individual SSIS packages or applied more generally to an entire database.”]
Source: https://gbhackers.com/server-integration-services-roles/