When you install Pro Tools | First, the Avid Application Manager is also installed. The Avid Application Manager is used to manage your software and entitlements related to your Avid master account. 

The Avid Application Manager helps you maintain the most current Pro Tools | First software and audio plug-in updates that you are entitled to when new versions become available.

For more information about the Avid Application Manager, see the Avid Application Manager Guide (available online through the Avid Knowledgebase).