@doktorno From how I understood it you create your own library of assets (or of course download meshes from the many sites that provide them).
More info is in the original article: https://code.blender.org/2021/06/asset-browser-project-update/
The Asset Browser will be a big milestone for Blender. A lot of effort goes into landing its first iteration for Blender 3.0. Here's a demo, some design background and a short introduction of the recently held the asset workshop.