Clipboard sharing between Chrome on desktop and Android is a beta feature, also known as a flag or experimental functionality. It takes a few steps to enable, and you'll need to do it on every device you want to share the clipboard on, but after that you'll be able to copy and paste with just a few clicks or taps. Here's how to enable and use Chrome clipboard sharing.
How to Manage Clipboard Access on Google Chrome Mobile
Chrome flags are experimental browser features that improve your browsing experience. Be warned that flags can cause data loss and security issues, and that they can disappear at any time. Some of the best Chrome flags will eventually become full-fledged features. Chrome flags are available to every user, but you must enable them one by one.
Open a new tab in the Chrome browser and type or paste Chrome://flags into the Chrome Omnibox.
Press Enter and search for Clipboard in the search box.