So you just put a lot of time into a section/ow or module on a page and then see it should go on another page. You have two options. 1. Start over or 2. save the row or module. Assuming you want #2, here is what to do.
Choose the wrench of the row or module
Choose Save As….. Name the module or row.
DO NOT choose Global except for special cases. Global means that if this is a row/module you’ll use in multiple locations, any change to it will automatically change it everywhere you added it.
Now go to the page you want the content to appear.
choose PAGE BUILDER, then the plus, then the Saved link.
You’ll see all saved rows and modules. Pick the one you want and drag it into place.