A service is a process run at a second level in the computer, providing some functions to the running of the operative system. Several antivirus, security copy tools or other processes that require a continuous running of the computer are often installed in such mode.

In this window you will see all the services installed in the system.

You will also know if they are running or if they are stopped.

Just as in the process flap, you will also see if such service processes are digitally signed.