In March 2011 Google introduced +1 button in search results for Google users to recommend your content right from the search results pages and finally Google launched +1 button for websites. The +1 button makes it easy for visitors to recommend your pages to friends and contacts exactly when their advice is most useful — on Google search. As a result, you could get more and better qualified site traffic.
There are 4 different size of Google +1 button for your websites, and you can pick anyone of them from official page to add it on your websites.
Google +1 looks like Facebook like button but the difference is like button only appears on the webpage while Google +1 button appears not only on webpages but also in Google search result. As potential visitors see recommendations from their friends and contacts beneath your Google search results, you could see more, and better qualified, traffic coming from Google.
We already added the Google +1 button on thetechexpress. Let me know via comment if you getting problem to add +1 button on your blog.