common events

this is a dumb question i know, but as far as i am in my game creation i have not needed common events, this is mostly because i dont know what they are why they are and what they do. please could someone quote a need for common events and tell me how to use them. cheers :oops:

common events are normal events
their usage is limited like every other normal event, their uses:
a. making an entire event or a part of an event that you will use more than once, by doing that you won't need to copy paste the event over and over, instead you'll just need to call the common event.
b. being linked from skills and items , thus making special things happen when a skill or an item are used.