Shepherd is a type of dog rather than a single breed. On listings it usually means a German Shepherd or a German Shepherd mix, but it can also cover Australian, Belgian, Dutch and English Shepherds and crosses with Labs, Huskies and others. What they share is ancestry in herding and flock-guarding work.
Most are medium to large, athletic and quick to learn, with a thick coat that sheds and a strong need to stay near their people. Some are reserved or protective with strangers. Because parks outside the dog parks require leashes, a Shepherd in Springfield needs daily exercise, training and a job to focus on. Looks and energy vary with ancestry, so a dog's behavior tells you more than the label.