Urubamba is the largest town in the Sacred Valley. It is a transport hub and gives easy access to all the tourist attractions in the area. It also has a large market in the center of town.
Unlike Pisac and Ollantaytambo, it lacks significant tourist attractions which means there are not usually many tourist to be found in the town, although there are several nice hotels close to the center.
It has the biggest and best market in the valley which makes it perfect for doing your food shopping at incredibly low prices.