You can mention your name and phone number on the collar so that if the cat escapes and gets lost, you can be contacted through the information contained in the collar. Also, some collars are anti-flea, which are used in many cases.
However, when using a cat collar, make sure that the collar is not too tight to hurt the animal's neck and not too loose. Because the cat has been seen licking its lower jaw under its collar while licking, which can be very dangerous. The optimal distance of the collar should be such that one finger can play. You can also use elastic collars. Also keep in mind that regular use of the collar may cause hair loss on the animal's neck.