This morning I described what is Google Co-op, but I also promised I would try to implement an example for this site. Well, we have implemented phase one of Google Co-op subscription links for this site. You can subscribe to the coop and then when you perform searches that are an exact match to one of the SER Categories, you should see the subscriber links results (if you are signed into your Google account) while searching.
It will ask you to login, if you are not, and then confirm your subscription. Soon after, if you search on any of our SER Categories by name you should see a result that looks like;
If you like, you can preview the results by clicking here and scrolling down the page to the bottom, where it says "Preview these queries." Click on an example query and you will see what it will look like.