On their turn, a player can trade cards with other players to improve their hand. The number of cards players can trade depends on the number of players in the game
For a 2- to 5-player game, a player can trade 1 of their cards with 1 card from any other player. Each player may make only one trade on their turn.
For a 6-player game, each player can make 2 trades on their turn. Each player can trade 2 cards with the same player or trade 1 card with 2 different players.
Both players choose which cards they want to trade, and players never have to trade if they don’t want to. Players can’t trade with a player that doesn’t have any cards and can’t simply give a card to another player. It has to be a trade.