If the notebook is something you can share publicly, then https://mybinder.org/ makes sharing even easier. You send a link, and the only thing the recipient needs is a modern browser.
If they want to actually work on the notebook and keep their changes, they'll probably need to install it (or switch to a platform like Cocalc). But Binder is enough to let them view, run it and make experimental changes, without installing anything or creating any new account.
If they want to actually work on the notebook and keep their changes, they'll probably need to install it (or switch to a platform like Cocalc). But Binder is enough to let them view, run it and make experimental changes, without installing anything or creating any new account.