In the "~/Library/Logs" folder, I discovered a folder called "Ubiquity", but I have no such app named "ubiquity" on my MacBook Pro.
I Googled and also searched here (Ask Different), but all references to "ubiquity" seem to relate wifi or iCloud syncing, and my MBP has had issues with both, so I am curious what Ubiquity is.
FWIW: I began looking into the Logs folder because a message popped up to warn me of junk files that I should remove-by upgrading some software. There is indeed a huge number of files, but Ubiquity is the only name I didn't recognize and can't associate with any software.