After you add a few general interest categories to your profile, your next stop is the "Feed" section, which is your standard social networking news feed similar to Facebook and Google+.
Your feed shows you every public post that other So.cl users are sharing online. But you can also pare this down to just the people and categories you are following, or take a look at the activity just on your posts. There's also a section under your feeds called "Conversations" where you can send direct messages to other So.cl users.
Our next stop on this So.cl whistle stop tour is the posting section. This is where So.cl's Bing-centric nature really comes into play, because before you can post any external content to So.cl it has to go through Bing first. The first way you can post is to choose a topic such as “surfing” or “Windows 8” and then search for it in the Bing-powered search bar at the top of the page.
Once you have your search results, you can drill down using the navigation links on the left to see results for news, images, and videos related to your search. To add a specific link to your post, you click the “Add to post” button at the bottom of each separate search result. You can then add a message and once you're satisfied with the post, click done.
The second way to post is to grab a link from a website and click the “Add link” button below the message entry box. Let's say you wanted to post an article from The New York Times. On any other social network you would just grab the article link, paste it into your post, type up a comment, and you're done. But not on So.cl.
Instead, you past your URL into a pop-up box that appears after you click “Add link” and hit enter. This causes a Bing search based on your link and then you can choose the article you want to share from the Bing-powered results.
Once you're post is out in the world, people can like it by clicking the smiley underneath your post. They can also leave comments, or share your post outside So.cl via e-mail or Facebook. There is also a link called “Riff” that lets people do a Bing search based on your post and then create their own posting. Finally, people can tag your post, which is just a quick way for a user inspired by your post to follow a category on So.cl.
Your So.cl profile is fairly standard. It lists your name and uses your Windows Live or Facebook profile picture, shows you recent activity and lets people comment on your posts or leave you a message.
So.cl also provides a Facebook-style cover photo section, but it appears So.cl automatically generates this based on what you share. That's just my guess, however, because I didn't see a way to change it.