I was trying to put iCloud on my desktop, so I clicked and held on it in the Finder sidebar and moved it to the desktop. It went ‘Poof!’ Now it’s not in Finder. I can open it by going to System Preferences. I’d like to have it in my Finder sidebar, and also in my Dock. How do I do that?
I’m not really sure what to do with iCloud, but apparently I need it because I have an iPhone.
Click on the desktop or open a Finder window, then command + “,” to get to Finder preferences.
Click on “Sidebar” at the top of the window that appears.
Check the box next to “iCloud Drive.”
As for the Dock, these instructions should work: How to Add iCloud Drive to Dock on Mac
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Thanks! 
I followed the directions to ‘type this exactly: /System/Library/CoreServices/Finder.app/Contents/Applications/’. When I clicked Go, it said ‘The folder can’t be found.’
It’s possible you just can’t do that anymore.
There is no need to go to the iCloud Drive usually. Really no need to have it on your Dock, Finder is a more natural place for it.
It is very cool. I have two laptops and an iPhone. iCloud syncs everything in Documents between my laptops. I’m usually reluctant to us sync facilities like this, but it works seamlessly. On the odd occasion where I have done something potentially confusing like open the same file on two laptops it has figured it out.
When you have iCloud activated, you will see that Documents is greyed out in the usual location on Finder, indicating that it’s a synced iCloud location. The only reason you might need to go to the iCloud Drive is that it shows both the iCloud and local versions of Documents, these would normally be in sync.
But the best thing is that I can use the iCloud Drive on my phone to access any file in Documents on my laptop. This has been incredibly useful so many times when I have gone to a meeting where I didn’t think I needed my laptop.
Riemann: Thanks for the explanation. I’ve avoided iCloud all these year because I didn’t want to be bothered. But it’s time I should catch up to eight years ago.