Logging out can be accomplished in two ways:
Using the Log Out Option
To Log Out, navigate to your User Name/Avatar in the top right hand corner of the screen. Click on your User Name/Avatar to open the drop down menu. From the drop down menu select Log Out.
Or by Shutting Down
By shutting down the computer or closing an application without explicitly logging out.
Reasons to Log Out
Logging out helps prevent other users from accessing the system without verifying their credentials. It also helps protect the current User's access or prevent unauthorized actions on the current login session and is an important part of securing your data.