（台阶式的）看台
a group of steps on which people sit or stand to see or be seen better
We stood on risers for the whole ceremony.
The kids hid out under the risers after the concert was done.
They sat on risers behind the main playing area.
The seats are on risers for better viewing.
A railing should be put at the end of each row since people will walk up and down the risers looking for their seats.
We need to set up the risers for the awards ceremony.
See also: riser (STEP)