Next the dealer turns over one card from the deck and places it face up on the table. This is the beginning of the discard pile that people play on. The player to the dealer's left goes first and plays one or more cards from thier hand. If more than one card is played, they must all have the same face value, ie, all 3's or all Queens. In general, to play a card, it must be of equal or greater value to the card that is on top of discard pile.
Aces are high.
If they elect not to do so, or if the card they draw cannot be played, then they must pick up the entire discard pile and add it to their hand. Players must keep at least three cards in their hand. So once a player plays some cards, they have to take cards from the top of the deck to bring the number of cards in their hand up to 3 again. And if there are no cards left in the deck, you of course don't draw anything even if you have less than three cards. Play continues around the circle.