Recent changes patrol is a feature that can help to decrease redundancy with many people checking the same edit.
It will highlight edits on recent changes which have not been marked as "patrolled" by another user.
This is a feature open to any logged in user. Unchecked edits appear with an exclamation mark (!) next to them. To patrol recent changes:
The feature can be enabled or disabled on any wiki on request, either completely (ask for the setting $wgUseRCPatrol) or enabled for admins only (ask for the setting $wgOnlySysopsCanPatrol). This feature is currently disabled by default. It is always possible for admins to patrol page creation through Special:NewPages, though.
For users with the patrol right, the patrol log isn't shown on the cumulative log by default.