Next to Damage done/taken and healing, one of the interesting aspects of fights are buffs and debuffs.
This comes in different varieties for different purposes:
Tracking buffs / debuffs across the raid
This aids in seeing when someone used a group affecting ability a Bloodlust effect or healing cooldown (e.g. Divine Hymn) and vice versa with large raid wide debuffs applied from the boss
Tracking debuffs by certain players on enemies
Useful for seeing uptime on DOTs and other damage increasing debuffs
Next to Damage done/taken and healing, one of the interesting aspects of fights are buffs and debuffs. This comes in different varieties for different purposes: