What it does is keeps an ignore list that stops messages from being displayed from the people on the list. Very useful for annoying individuals or spammers.
To ignore people: /ignore add name
To unignore people: /ignore remove name
!!!JUST PUT THE NAME NOT THE CLAN TAG!!!
So if you wanted to ignore me: /ignore add blam
To view who you have ignored: /ignore list
Note that it automatically saves your ignored list when you add and remove people.