Unwanted faceting on closed solids, etc

I may have changed a setting I’m not aware of, but I’ve (of late) been getting unwanted faceting. No crazy geo. Looks similar to Sketchup where the curves aren’t truly curves, but many facets. Is this a “render mesh” thing? (I wonder because I’m pretty unfamiliar with render meshes, and I see that phrase kicked around quite a bit on here.)

EDIT: file…facetedGeo.3dm (225.0 KB)

Hello- see
https://wiki.mcneel.com/rhino/meshfaq

and

http://www.hydraulicdesign.net/meshes.htm

-Pascal

Gracias