What is eta meaning in chat?

ETA stands for "Estimated Time of Arrival". In chat, ETA is often used when someone wants to know how long it will take for someone to arrive at a destination or complete a task. For example, someone might ask "ETA on your arrival?" to find out when a friend or colleague will arrive at a meeting or event. ETA can also refer to the estimated time it will take for a delivery or package to arrive at a certain location.