Nobody likes to think what might happen if they lose their cat. In the old days, people relied on tags and collars that could easily fall off. Today, people can identify their cats using microchips.
Basically a microchip is about the size of a grain of rice that gets implanted under the cat’s skin. This microchip contains your contact information so if anyone should find your cat, they can read your contact information in the microchip, thereby helping reunite you with your cat.