Zotero's Group feature lets you share references with other Zotero users.
If you want to share your library but don't want others to add to it, you can change the settings of your library to make it public.
Now your Zotero library is public and you can send the URL to others so they can see your library!
If you've made your library public, others can subscribe to your library feed through something called an RSS feed! You can use RSS feeds to get automatic updates when someone adds content to a library you are subscribed to.
To subscribe to a Zotero library RSS feed:
Now you are set up to get automatic updates from the public Zotero library of your choice!