Pet collars are accessories worn around the necks of animals, primarily dogs and cats. They serve various purposes, including identification, safety, and style. Many collars come with a tag that displays the pet's name and owner's contact information, helping lost pets find their way home. Collars can also hold leashes for walking and training. Some are designed with features like reflective materials for visibility at night or quick-release buckles for safety. Additionally, there are specialized collars for specific needs, such as training collars or flea collars, which help manage behavior or pests.