In specification 38.473, what does DRX Configuration mean?

[shanjaffry]

Hi All.

In specification 38.473, what does DRX Configuration mean?

As in the image below:

Also, what does ‘release’ means in this sentence?

[Sushil_Kumar1]

Releasing drx configuration is like not using the configuration further.

[Anver]

Here is an explainer video upon DRX configuration: Energy Saving Techniques for UE in 5G: RRC States, DRX, and CDRX - YouTube