Has much shorter range than the equivalent Fireball spell, but the fact that it is cast instantly instead of as a projectile makes it much easier to hit moving targets so long as they're within range. Rapidly moving targets (such as deer) may go flying, however, depending on the direction that the spell approaches from.
Can be used to make "bank" shots to hit enemies you can't actually target directly by aiming at a surface (ceilings, floors, walls, etc.) that has a line of sight to them.
If enemies are struck with the spell while it is dual-cast and you have the Impact perk, it will stagger them (and anyone else close by) as usual, but if it is dual-cast on the ground (so it arcs up and strikes them) while having the same perk, those struck aren't staggered at all.