Some are pure manure and others are mixtures. It is heavy and holds a lot of moisture. All manure products have been thoroughly composted and shouldn't have any unpleasant odor. Peat and Sheep is a mixture of composted peat moss and sheep manure. Manures are intended for use outdoors to incorporate into the soil for flower and vegetable beds or to mix with existing soil when planting trees or shrubs.
Manure does add some nutrition as well as organic matter.
Occasionally you will find a packaged product labeled top soil. It is usually a mixture of composted peat and sand. Top soil is intended for outdoor use and is a heavy mixture. It should not be used to fill containers because it won't hold enough air for the roots or be adequately drained. There are two types of peat sold as bagged products in garden centers.