Google wants you to share the web sites that you come across or enjoy on the web with your friends which is why they’ve introduced "Shared Stuff." Using a bookmarklet that you drag up into your browser’s bookmark bar, you’ll be able to easily share any web page with one click. Users can also create a mini Profile (optional) where you’d have the option of adding a picture and filling in details in the ‘about yourself’ section. Essentially, Shared Stuff is Google’s version of social bookmarking.
When you find a website that you’d like to share, all you have to do is click the "Email/Share" button and then a window will appear displaying your options. You can share your finds via the My Shared Stuff Page, but keep in mind that your "My Shared Stuff Page" is publicly visible. You can also email the page to a friend, or you can even post it to select social bookmarking sites like Facebook, Furl, Reddit, Social Poster, del.icio.us, and Digg.
If you’re sharing via the My Shared Stuff Page or email, you’ll have the option to include either an article preview or just the link. Additionally, you can also add a comment, or add tags. The final step would be to click "share" and your friends and family members that you’d like to share it with would be able to view it on your page or via email.
If you don’t see yourself sharing your finds with friends but you’re curious as to what people are sharing amongst eachother, there’s a "Most Popular Shared Stuff" page where you can see all of the popular pages. At the moment, the most popular shared web page is "Fast Food Facts – Calories, Fat and other nutritional information.
No official announcement has been made by Google regarding Shared Stuff, so I assume they’re just testing the waters before they make it official.
Source: Google Blogoscoped