The Dynamic Thread Priority Boost provides a brief additional priority boost when a thread is awoken from a wait state. So, for instance, when an app becomes active, it gets a tiny short-lived boost in priority. This is an addition to the longer-term foreground boosts that Windows already provides, or that Process Lasso’s Foreground Boost would extend. The Dynamic Thread Priority Boost setting is enabled for all processes by default, and it should usually stay that way.