letting the rest of us know what these cases are about?

Was where they seized private land to give to pfizer.

They were allowed to do it.

To help Pfizer (I think) develope a complex.
Sullivan was the case that made it difficult for public figures to sue the media for libel.
Both of the issues have been long time causes for Federalist Society types. Trump was always complaining about Sullivan.
I think relisting just means the justices will vote soon on whether or not to hear the cases.