Conjunctions:
Some folks are a bit anal about this subject. These are group-only moves that pop up as you are fighting things with your group. Basics to help you "get started" on this:
Red = direct damage attack. "the basic" used most of the time. If you're not sure what conjunction move to use -- hit red.
Yellow = damage over time attack.
Blue = heal power (power = mana/rage/energy from WoW).
Green = heal moral (moral = HP from WoW -- duh! *snicker*)
If you get 4 circular buttons, of different colors, popping up on your screen while in a group... That's a conjunction and you have "the main target" picked that'll be "hit" with the conjunction. If you get a lilttle bulls-eye symbol up, you have a different thing targeted than the main target. Clicking the bullseye will shift what you have targeted to the main target and bring up the 4 circular buttons rig.
Conjunctions are both simple and complex to work with and you'll run across some "it's so easy! Why can't you people get it straight!!!" types 'traditional' style folks as you play. A lot of them are Burgulars (why? they have the tools to triger these -- thus the old "rogues suck in groups!" stuff takes a hike here... they are one of the most important parts of a group in this game due to their ability to pop conjunctions up but also get the most frustrated when their "group move" is "trashed" by someone not knowing what to do... <grin>)