In PUBG (PlayerUnknown's Battlegrounds), the "Push to Talk" (PTT) button is a feature that allows players to communicate with their teammates using voice chat while playing the game. When the Push to Talk function is enabled, your microphone will only transmit your voice to your teammates when you hold down a designated button, rather than continuously transmitting all background noises and conversations.
By default, the Push to Talk button in PUBG is set to "T." So, when you want to talk to your teammates, you hold down the "T" key on your keyboard while speaking. Once you release the key, your microphone will stop transmitting, and your voice will no longer be heard by your teammates.
Push to Talk is a popular feature in team-based games like PUBG, as it allows for clear communication and reduces the chances of inadvertently broadcasting unwanted sounds or background noise to your team.
Keep in mind that the key binding for Push to Talk can be customized in the game's settings if you prefer to use a different key for this function.