The Borg are genetically and cybernetically altered humanoids.
They function as a collective made up of thousands of species who have been assimilated.
The Borg collective is similar to an insect hive: there is one queen and the rest are drones who work for the greater good of the collective.
Borg drones have no sense of individuality.
Instead, they have what has been termed a "hive mind" their minds are linked in a "collective unconsciousness via a unique subspace frequency emitted by each drone".
The hive mind is "collectively aware" all Borg drones receive the information acquired by an individual drone.
The Borg collective takes its orders from the Borg Queen ( the cell ).