Urgency
Urgency is a concept in speedrunning that describes the time spent between being able to initiate an action and initiating the action. It is one of the most important aspects of improving speedrun times.
"The Concept of Urgency" Explanation Video by JustinDM
Improving Urgency
One of the most common methods of improving your urgency is by practicing Individual Levels and Room Strategies. By repeating the same room strat and trying to do it faster each time, urgency will naturally start to build up. For example, if there's one room that you perform a Scan Dash in to a door to get through the room, you can repeat the scan dash repeatedly while trying to input it earlier each time until you are unable to do it any earlier. Urgency can also be improved by having Strategies for all rooms and required movements. This can be done by building muscle memory through repeating Strategies in practice, speedruns, and races.