Timers are officials with stopwatches who are responsible for keeping track of time in a variety of sports and other activities. They are often used to measure the duration of a race or game, or to ensure that competitors adhere to the rules regarding time limits. Timers are also used to measure the speed of a competitor's performance, such as in track and field events. In addition, timers are used to measure the time taken to complete a task, such as in cooking competitions.