What is the 1 10 rule in D&D combat?

The 1:10 rule is a commonly used roleplaying mechanic that limits the time players can make choices about their actions to ten times the length of action their character can take. In combat this means that when a player’s turn comes up, they are given one minute to make up their mind about what they want to do. 10-Feb-2021

https://www.masterthedungeon.com/the-110-rule-for-dnd-combat/#:~:text=The%201%3A10%20rule%20is,what%20they%20want%20to%20do.