Duration

A spell's duration is the length of time the spell persists after it is cast. A duration typically takes one of the following forms:
Concentration. A duration that requires Concentration follows the Concentration rules.
Instantaneous. An instantaneous duration means the spell's magic appears only for a moment and then disappears.
Time Span. A duration that provides a time span specifies how long the spell lasts in rounds, minutes, hours, or the like. For example, a Duration entry might say "1 minute," meaning the spell ends after 1 minute has passed. While a time-span spell that you cast is ongoing, you can dismiss it (no action required) if you don't have the Incapacitated condition.