Palm reading is often dismissed as a parlour trick or a a way for a fortune teller to make a quick couple of quid. But palmistry, to use the practice's official term, is a very old form of divination. More personal than tarot reading or rune casting, and more variable than one's birth chart, a thorough palm reading can (if you're into such things) reveal what you've possessed within you since birth and also tell you... what may lie ahead.
Like any esoteric practice, palmistry has many different forms and can be very complicated — more so than your average reading might let on. A longer, more in-depth palm reading might address finger proportions and lengths, which can tell the reader about specific facets of your personality, and the mounts of the hand, which are an entire subsection of palmistry on their own.