Teleportation is a supernatural ability to move/transport instantaneously from one location to another without physically occupying the space in between and Abigail Williams' signature spell to ambush unsuspecting enemies.
True to its name, teleportation enable a spellcaster to transfer matter (beings/objects, including themselves) or energy from one point to another without traversing the physical space between them. This spell is done by disassembling desired target's molecules and reassembling them at the desired area.
While teleportation may seem like it is simply for travel, it can be a valuable sorcery as it can be used offensively while offering superiority regarding movement speed and distance coverage. A skilled strategist/tactician can use it for many innovative manners such as ambushing enemies.