The split lets you connect a single Bit to 2 others. If you place an input before the split it will control the 2 outputs at once like a single light sensor controlling 2 motors (to spin car wheels!). The flexible wires on the split also allow you to place your Bits farther apart and position them how you like.
HOW IT WORKS
The split divides the incoming signal and sends it to the 2 output bit snaps.