Often new users of Slicer are confused about what version of Slicer to use, and also how the stable and preview versions differ from each other.
It also doesn’t help that the current preview has red “unstable” text next to it.
I suggest something like this to be added below the installer table:
Which version of 3D Slicer to install?
Stable: Is more rigorously tested but will not contain the latest features and functionality added to the Slicer. All extensions are available.
Preview: is bleeding edge and is changed daily. Some days preview versions may not be fully functional or extensions may be incomplete. If you encounter a unstable preview version or it is missing the extensions you are looking for, you will have to install another preview version in the next day or so.