David Beisel writes:
Social shopping is about sharing the act of shopping itself with others, and I view it as a subset of social commerce as a whole. Just as some people enjoy shopping with others in the real world, some will enjoy doing it virtually within a social network. Nearly all of these players have promoted a meme of three activities which people can do collectively: discover/find, collect/organize, and promote/share/connect/recommend/publish. It is these three acts which compose the endeavor of shopping together with others.
An element of social input in online shopping services augments the experience, even if it isnt central to it. There are numerous opportunities to add a layer of social features to an existing set of commerce functionality or to new services which arent primarily social.