The hand occurs so infrequently, in fact, that you could play thousands of poker hands and never make a royal flush. A standard poker deck yields only four ways to make a royal flush, as the royal flush stands as the rarest of poker hands. The official definition of royal flush is a ten-to-ace straight with all five cards of matching suits. Royal flushes top all other hands in the poker hand rankings and are mathematically the rarest made hands that you can draw from a 52-card poker deck.
The royal flush represents the strongest hand you can possibly make in a game of poker.
