Veteran developer Sybren Stüvel is once again bearing gifts to Blender's Animation and Rigging module, this time through his work on the new Pose Library.
— Sybren A. Stüvel (@sastuvel) April 30, 2021
During the latest meeting of the aforementioned module, Sybren presented his work in a presentation that shows the new Pose Library in action. The presentation goes over Pose Library use, Pose creation and Pose Exploration. It then goes into the various ways to access and use the Pose Library, including via the asset browser and from the 3D View side panel.
The video above demonstrating the use of the Pose Library via the asset browser is one of many present in Sybren's presentation, which I highly recommend checking out on the link below: