An electronic boost controller is a device used in turbocharged engines to regulate the amount of boost pressure produced by the turbocharger. By controlling the wastegate, it allows for more precise management of engine performance, improving power output and efficiency. These controllers can be set to different boost levels, enabling drivers to customize their vehicle's performance based on their needs. They often feature digital displays and programmable settings, making it easier to monitor and adjust boost levels compared to traditional mechanical boost controllers.