The Redirect Menu is only available for users of both Chronicle SOAR and Chronicle SIEM. A Chronicle module will be included in your License screen.
Note that you have to log in with your Chronicle SIEM username and password the first time you are redirected.

The Redirect Menu is located on the top header bar and can be accessed from wherever you are in the platform.

The menu can only be used AFTER you set up a URL instance for the Chronicle SIEM platform in an environment in the Settings > Organizations > Environments. For more information on setting up a URL Instance, click here.

The Redirect menu consists of two options:

UDM Search: This takes you to the Chronicle SIEM landing page where you can search for different items or investigate a specific alert. For more information, refer to  Quickstart: Conduct a search and to Quickstart: Investigate an Alert.

Rules: This link takes you to the Rules Dashboard screen in the configured instance in the  Chronicle SIEM platform. For more information, refer to Viewing Rules in Rules Dashboard.

For all Chronicle SIEM documentation, please look on Google Cloud.