<VV> 4-Piston Calipers - Non-Corvair

[WillSmithTFPOCAllenTexas]

Can someone tell me what the advantage[s] is of a 4-piston brake caliper over a 1-piston caliper?

Will Smith
"The Fresh Prince of Corvair"
WANTED: 66 Monza vert, 110, pg, white top, no rust, great condition, driver for Parade Duty and taking kids for a ride in something they've never seen plus playing "Find the Motor".