Confused about iCloud
I am getting messages on my iPhone and iPad that I am almost out of my storage limit in iCloud. I was not aware I was storing anything in iCloud. Not sure how to find out what is in there, but here is my real question. If, for example, I go into Settings, Pages, Document Storage, and select On My iPhone, it says -- "... Store documents only on this iPhone , and do not make them available on other devices." I want to be able to have documents, contacts, and other things appear on all my devices -- iPhone, iPad, and iMac, but I do not want to store them in iCloud, necessarily. Do I have to store things in the iCloud drive in order to have them appear on all my devices? No idea what settings I need to make. Thanks.
iPhone 11