In the Employee Editor window, when your company's TSheets administrator enters a new employee's email and clicks Send Invite, the employee receives an invitation email asking them to join your company's TSheets account so that they can track their time.
The employee clicks Accept Invitation, enters their name, creates a password, and joins the account.
When the employee signs into the TSheets web app for the first time, the following video displays:
Also displayed is a box for them to enter their mobile phone number. After entering it, a link is sent to their phone so that they can easily install the TSheets app on their mobile device.
Also, they will receive a welcome email (example shown here).