What does the warning light exclamation symbol inside a rectangle on Honda Pilot?

My 2006 pilot has a VSA light which is an exclamation point inside of a triangle. When we bought the car and the the salesman was giving us the Honda short course, he said "See this button, right here? Keep it ON." and just told us that it had to do with stability. Hense Vehicle Stability Assistance. Occasionally I'll bump it with my knee when getting in the car, and trigger this dash light, warning you that it has been turned off. It is located just inside the driver's door on the bottom edge, to the left of the steering column in a cluster of three switches. (the cruise control, cabin lights and VSA. Depressing the button takes care of the problem for me. If doing that doesn't cancel the light I would definitely take it to my mechanic.

the Honda website defines VSA as this: Vehicle Stability Assist™ (VSA®)[1] with traction control, which helps sense oversteer and understeer conditions, then brakes individual wheels and/or reduces throttle input to help restore your intended path of travel.