Teams is a way do defines you who wish to work on a job. 1 employee can be on multiple teams where as you can only be in 1 department. See this article regarding departments
In this section you will create teams. Move employees from the resource pool to the selected team by clicking the arrow. And move them back by clicking the back arrow if they no longer are part of the team.
Create a new team
Create a new team by clicking this button
Delete a team
And delete a team by clicking this button
Update ongoing jobs for the selected team
This button will update all ongoing jobs for the selected team
Update active jobs with the team setup
This button will update all active jobs with the complete team setup
Add/remove resource(s) to/from jobs for the selected team
If you click this checkbox the jobs of the resources which are added/removed will be updated with the change.