[1] Its effect on play is similar to that of a timeout: the game clock stops and the teams gather to discuss strategy.
An additional rationale for retaining the two minute warning is related to the value of television airtime at that point in the game.
Television networks invariably run commercials as soon the two minute warning is called, with those slots being among the most lucrative of any in a major football telecast.
However, in the postseason, where games continue indefinitely until there is a score, the usual timing rules for a half apply in overtime.
"[5][6] In addition to those practical purposes, gradually, some rules have evolved that are unique to the final two minutes of each half and overtime.
Starting with the 2017 NFL season (and later in the 2024 NCAA football season), any review reversals with the clock running inside the two-minute warning will incur a 10-second runoff, unlike other offensive penalties, neither team can decline the runoff, which can be avoided if either team uses a timeout.
[12] Exceptions to the above include if the other team called a timeout immediately after the previous play; the injury was caused by a foul by an opponent; or the previous play resulted in a change of possession, a successful field goal, or was a conversion attempt.
Before 2024, no comparable rule existed at the high school or college levels; at the high school level, the officials are instructed to inform each sideline when three minutes remain in a half, but the rule does not stop the game clock.
In April 2024, the NCAA Football Playing Rules Oversight Committee approved the addition of the two-minute warning, effective with that season.