What are workspaces?
Workspaces are separate working environments that let you create multiple independent teams and make sure that projects they're working on are completely isolated.
Each workspace has its own project dashboard, members, billing settings, invoices, and other settings such as integrations and branding.
Once you sign up, most likely you will have only 1 default Personal workspace. Unless someone else invited you to their workspace in which case you'll have a drop-down menu on top where you'll be able to select a workspace.
You can create an unlimited number of workspaces, but it's important to understand, that each workspace has a separate subscription so you will need to upgrade each new workspace to Professional plan before you can add any projects or invite new team members into it.
When should you create a new workspace?
There are few scenarios when you need to have more than 1 workspace.
In most cases, all you need is to share individual projects and assign the right access levels so that only a given group of people see this or that project.
See how project sharing works.