sharath cherukuri wrote...
How to trigger a process when something on my site is updated in publish?
You need to use event listeners. Looks at the below articles and you will get an idea.
Please have a look at this community article:-
//listen on authoring for replication events (see the "Event" page on the Felix console for replication events) and then react accordingly. (Answer by Jörg Hoh)
// Launcher Basic in the workflow console
I hope this will work for you.