This command is responsible for whether your crosshair in the game will be dynamic, that is, with a value of 1, the crosshair will expand and contract while moving, jumping, or any movement. Some more useful CS 1.6 console commands to customize the game.
Use this command correctly, otherwise you may get banned on the server for an incorrectly set variable value. A smaller value is mainly used only during the game on LAN servers, where ping is usually from 1 to 5. This command affects the appearance of the model in the game. If the ping is high (more than 10-15), then feel free to prescribe ex_interp 0.1. If your ping (latency to the server) is less than 10, then set the value: from 0.01 to 0.05. This is a very important variable and should not be neglected. Now a little about the ex_interp command.