Among the many things to like about Piazza delle Erbe:
Taxi stand (one of very few in Verona)
Wide selection of restaurants
Never-ending flea market (seems to wind down at 7:30PM which is dinner-time in Italy) where I purchased a scarf for 5EU and leather gloves for 15EU. Several of the vendors have the identical merchandise at different prices, so walk around first before you make a purchase.
Occasional street musicians