Airtable was built from the ground up to support effortless collaboration. One of the main ways in which you can collaborate with other people in Airtable is by creating a workspace.
Once you've created a workspace, you can invite workspace collaborators. Workspace collaborators have access to all bases in the workspace. You can create as many workspaces as you'd like for free, and each one has its own set of workspace collaborators and bases.
To make a new workspace, scroll to the bottom of the homescreen and tap the row labeled + New workspace.
You can edit the name of the workspace, manage the workspace collaborators, or delete the workspace by tapping on the button to the right of the team's title. This will bring you to the Edit Workspace menu.