Summarize this article:

The judge should flip over the card at the top of the green deck and call it out to the group. Green cards bear descriptive terms that must be matched by the people, objects, places or events on the players' red cards. The green card in play might read "Cute," "Harmful" or "Patriotic." These terms are designed to describe the red cards laid down by players each round. There are over 749 red cards and nearly 249 green cards in the basic version of the game. That's enough different matches for hours and hours of fun. Players will now select one of their seven red cards to associate with the word on the green card. For example, a player might play a red card reading "Babies" to match a green card reading "Cute." There are nearly endless possible combinations of red and green cards, so get creative! Each player should choose a red card to play quickly to keep the game moving at a brisk pace. Cards should be played face down beside the green card. The judge is the only player who will not lay down a red card. The judge changes every round, giving everyone an equal chance to play. After every player has laid down a red card, the judge should shuffle or mix up the stack of red cards in play. This will ensure that the judge doesn't know who played each card. The cards should be left face down as they are rearranged. There's no need to shuffle extensively. Just reorganize the red cards until they're out of the order in which they were laid down. Now the judge will turn over and look at each card. Whichever card the judge decides is the best match for the green card wins. The winning player will identify themselves and collect the green card from the round. The player to the left of the first round judge will become the new judge, players will take one card from the red deck to replenish their hand and the game will continue. The number of green cards accumulated by the end of the game determines the winner. The official Apples To Apples rule guide suggests 8, 7, 6, 5 and 4 green cards be the winning number for games with 4, 5, 6, 7 and 8 players, respectively. After the round-winning card is chosen, all red cards that have been played should be returned to the bottom of the red deck. The game's official rules recommend that players compete for a certain number of green cards in order to win. However, you can modify this number as you see fit. For instance, you might play for 10 green cards to keep the game going longer, or take a "sudden death" approach and see who can win 3 cards the fastest. The options are totally customizable, depending only on the number of players in your group and how you'd like the game to proceed. You might also elect for players to replace their red cards with green cards for a winning outcome. For this to work, a player will add the green cards they've won to their deck after each round, meaning they'll have fewer red cards to choose from. Once a player reaches seven green cards in their deck, they are declared the winner.

Summary:
Turn over the top green card. Lay down a red card to match the green card. Mix up the stack of cards. Decide who has the best match. Choose a winning number of green cards.