Time In Force

What Does Time In Force Mean?
A special instruction used when placing a trade to indicate how long an order will remain active before it is executed or expires. Time-in-force options allow traders to be more specific about the time parameters in which an order is activated. This is especially important for active traders.

Investopedia explains Time In Force
Time-in-force options will depend on your broker. Most often, they include options such as day order, good 'till canceled, fill or kill, etc. For example, a day order, as the name implies, is valid for the current trading day. Good 'till canceled orders, on the other hand, will remain live until they are canceled.