EBB provides groups of statusbar style indicators to show (de)buffs currently affecting your char or some other units (currently focus, pet and target). For the player, it can also show indicators for temporary enchants place on it’s weapons.
Note for players using this with Cataclysm or later:
Due to changes Blizzard made with WoW 4.x it’s no longer possible to cancel buffs without the use of secure frames. Currently EBB limits canceling of buffs to out-of-fight since using SecureAuraHeader would have required a major code restructuring. This will be coming in a later version.