SharePoint makes it easy to share information, but permissions can become confusing over time.
A user may receive access through a group, direct sharing, a team, or a link. After months or years, it may be difficult to remember why someone still has access.
Businesses should keep permissions as simple as possible.
Use groups instead of assigning access one person at a time. Avoid creating too many unique permission structures. Review guest users and shared links regularly.
Sensitive sites should have clear owners who understand who should be allowed in.
A simple permission model is easier to secure and easier to explain.
The goal is not to prevent collaboration. The goal is to make sure collaboration happens with the right people and can be reviewed later.