What people see is dependent on +1 settings in your Google Profile

However depending on your Google Profile settings, your social connections as outlined above may see your recommendations and you may be able to see theirs.
You may be thinking this is all well and good, but how does it help SEO? Until recently the +1 button only appeared on the Google search result, but now Google have opened it up for web site owner's to add it to their own web pages as well.
This means if you have good quality content people can recommend it to their friends very easily thus offering you another source of qualified website traffic.