Following a blog shows authors and readers of the blog that you're a fan, and you can keep track of the blogs you follow via your Reading List on the Blogger dashboard.
How do I follow blogs?
There are several ways to follow a blog. One of the easiest ways is to visit a blog that has added the Following widget and click on the "Join this site" button under the "Followers" widget:
After you sign in with your Google Account (or another account if you so choose), you'll then see a popup window with the options to either follow publicly or privately.
Select how you'd like to follow the blog, then click the "Follow this blog" button. If you elected to follow the blog publicly, your profile picture will be displayed on the blog with a link to your Blogger profile or Google+ profile (if you've opted to link your blog to your Google+ profile). When you become a follower of a blog, the blog will also be added to your Reading List on your Blogger dashboard. You can become a follower of any blog or URL (even if the blog doesn't have the Followers widget) by adding the blog to your Reading List on the dashboard, like so:
Note: Use Julie Mehretu blog, find on tumblr.