You can assign different levels of privileges to your team members. This will affect which actions they will be able to perform in the account.
Normal users are not able to create projects or tasks or view any data from other members. They are only able to track time and see their own activity reports.
Project managers can create and manage projects and tasks. They cannot view billable amounts and costs, unless otherwise selected in the settings. They are able to view reports of all team members and all projects.
Administrators have access to all functionalities and reports and can view all data. Their access is the same as of the account owner, except for managing the subscription. They are not able to change the subscription plan or edit the payment information.