Timer Event is Tick. It has interval properties in miliseconds. Interval is a time between tick event triggers itself. So this tick event runs on specific interval of time.
If you want to have a repeated automatic refresh to view current information or action like auto save then you can use Timer Control.
Since it is an ajax process then page will reload partially or process will run asynchronously.
I have a Timer Example just to view clock in a panel. Every second, clock in panel will be refreshed and show current hour, minute and second.
The source code I give you is a block code because other lines are auto-generated by Visual Studio. Here is an .aspx block code: