Window of neuroplasticity
The window of neuroplasticity is the idea that there is a period after a session when new patterns form more readily.
Neuroplasticity is the brain's ability to change its connections in response to experience. A window of neuroplasticity refers to a period after certain kinds of experience in which new patterns may be laid down more readily than usual.
It is worth being careful with the phrase. It is a useful frame rather than a measured clock, and there is no agreed number of days that applies to everyone. Where you see a confident figure attached to it, treat that figure with suspicion.
What makes the idea worth keeping is the behaviour it encourages. If the period after a session is a time when new patterns take more easily, then it is the time to do the plain work: write it down, tell someone, change one small thing, and repeat it.
The practical version needs no neuroscience at all. Act on what surfaced while it is still fresh, because acting on it later is harder, and remembering it accurately is harder still.