Teams are the groups of people who actually do the work. You assign a Team to a Project to control who can access and contribute to it.
A Team belongs to an Organization. You can have multiple Teams in the same Organization — and assign different Teams to different Projects.
Select the Organization where you want to create the team from the sidebar.
Name the team after its purpose: "Design", "Engineering", "Client Alpha", etc.
Add members from your Agency. Each person can belong to multiple teams simultaneously.
When creating or editing a Project, select this team as its working group.