For each service, this is the list of items found in each column:
Service name
Current Status: either running or stopped
Info: Click on that button to get a little explanatory text on that service
On Boot: Check this box if you wish that this service be automatically brought up at boot time[1]
Start: immediately starts the service, or restarts it (stop+start) if it is already running
Stop: immediately stops the service
[1] | Generally in runlevels 3 and 5 |