Conjuration is the Magic college of binding creatures, daedra, or undead in the form of summons or weapons and armor for use in combat.
Perhaps Conjuration's signature abilities lie in the power to summon allies for a duration of time, even from the planes of Oblivion. Examples of Conjuration spells for summoning include Summon Skeleton and Summon Daedroth, but the ability to banish Daedra or turn undead is also considered an act of Conjuration.
Conjuration will also allow the user to temporarily "summon" magical weapons and armor that can be powerful, durable and weigh next to nothing all at the same time. Equipment fashioned in this way are actually lesser daedra "bound" to the caster in the form of items. In the case of armor, the Conjurer may choose to summon either Light or Heavy kinds to suit their proficiencies.
In The Elder Scrolls V: Skyrim, Bound weapons summoned through Conjuration will have a Soul Trap effect, giving users more options to help fill up Soul Gems. Bound weapons will also be able to "Dispel" certain creatures, banishing them.
Skeletons, zombies and Atronachs are a few the examples of creatures Conjuration users can summon themselves, and creatures will have more Health to last longer. The "summon limit" for Conjuration users will also be raised.