Obvious as it may seem, most pet owners have not tagged their pets. They give many reasons, from the tag being uncomfortable for the pet to the fact that their pet is primarily indoors and thus no need for identification.
A pet’s collar or tag which has the pet’s details is essential. It is a security feature. A tag should have your contact, the name of the pet and maybe the general area of where you live. A pet tag will save you some deal of pain in the worst case you lose your pet. Unless stolen, a tag on your lost pet will make sure you get your cat or dog back. This fact is emotionally calming to pet owners and will also save you the reward fee you will most likely offer to anyone who finds your lost pet.