Tokens and bands are basically the same thing in forks or rear shock. The suspension is using air springs. the Tokens and bands are used to reduce the volume inside the air chamber. This change of size is used to effect the way the air pressure increases in the air chamber. This changes the feel of the spring in the way it ramps up as it travels through its stroke.
It can give the spring the feeling of ramping up as it gets to the end of the travel to stop bottom out but keep the nice supple feel the is good on small bumps at high speed.
Some old shocks / forks suffered with a lack of ramp up, so they either blew through the travel when run at low pressures to try to get nice small bump feeling, or you had to run them with so much air to prevent bottom out that the small bump suppleness was gone.
The new air forks shocks have come on a long way to get a good balance, and now riders can add / remove tokes , spacers etc to try to tune the suspension to what they feel works for them.