Metazoans is as name suggests. (Meta-beside or after: Zoon-animal) The most notable trait that sets metazoans apart from it's protozoan cousins is that these cells have learned to work together to form complex organisms capable of movement.
Metazoa is the taxological name for the "animal kingdom". Under Metazoa you will find every single furred, feathered, skinned, scaled creature that ever creepy crawled on the face of the Earth. This is where you are. Just know you are in the same Kingdom as the worm and the racoon, and that you have a city of cells that have done what so many could not. Now get moving.