Valet comes from a French word meaning servant, and it has two main uses today:

A valet is a person whose job is to park cars for guests at hotels, restaurants, or events. When you arrive at a fancy hotel, you can hand your keys to the valet, who will park your car for you and bring it back when you're ready to leave. This service is called valet parking.

The word also refers to a personal attendant who takes care of someone's clothes, luggage, and personal needs. In historical settings, wealthy men employed valets to lay out their clothing, polish their shoes, and pack for trips. You might encounter this meaning in classic novels where a gentleman's valet helps him get dressed for a formal dinner. While few people employ personal valets today, the term still appears in hospitality and home life: a valet stand is a piece of furniture designed to hold a suit jacket and pants to keep them wrinkle-free overnight.