The Store doesn't list any info and Google search finds nothing.
Clicking any of those 2 options doesn't do anything.
There's some info over on mspoweruser website.
Says it's currently just a placeholder.
Rumor is it's part of a new modular / dynamic update service run from the Store instead of Windows Update.
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Bad move on Microsoft's part not giving Insiders a clue
what something new is about.
Now I've uninstalled it and the Store does not find it again.