The Google +1 is hottest social app by Google and many people are really getting serious about the Google +1 is because it will be used as one of the factor to determine page importance and relevance. In Google Webmaster Central +1 FAQ, it is stated clearly that:
Once you add the button, Google may crawl or recrawl the page, and store the page title and other content, in response to a +1 button impression or click.
So, if you get more the Google +1 for your content the more traffic you will get not only from the friends of friends but also from Google search.
How to add the Google +1 Button to the Catalyst Theme
First, you have to grab the codes from Google and customizing the style of the button, the codes will be generated. You have to copy the first section under the comments (2 line’s first) and paste in that line of codes before. After you have done that, you have to copy the second piece of codes and paste in the where you want the +1 button to render. In normal wordpress theme, open the singles php file. Look for the line . If you want the button appearing before your post, paste the Google +1 button codes before this line. If you want it appearing after your post, paste it below that line.