Google Plus is important? How add google 1 + button to my website? My site: http://vnreal.net Thanks all my friend ...
Google+ is good and you can get traffic too- Add button using the instructions in the page- https://developers.google.com/+/web/+1button/
you can add G+ button through plugin. There are many plugins available. Install them on your website.
Now, Google is considering its social networking site Google Plus to be the most important factor in ranking. Integrate Your Google Plus business profile page for your site. https://support.google.com/webmasters/answer/1708844?hl=en