Google Friend Connect is a widget that allows to connect people to the blog to get frequent updates of a particular blog. This increases the interaction between the people who like a particular blog updates and also enhances the look of the page. It is provided by google. when Google introduced Google+, Google+ automatically occupies the Google Friend Connect widget. So, Google Friend Connect widget go down the list of widgets, which are not removed or replaced.
You can also read its 7 Benefits of Google Friend Connect Widget
To add Google Friend Connect, just follow the steps.
Step 1 : Go to Blogger and select your blog, which you want to add Google Friend Connect widget.
Step 2 : Select Layout >> Add a Gadget
Step 3 : Now a pop-up window will open to add a Gadget. Then choose More Gadgets and go to Bottom of the page.
Step 4 : Select Followers widget and add it. Thats all. you are done!!!