"Share" button on WordPress

1.Log-in to your WordPress blog.
2.Click on Plugins in the sidebar.
3.Scroll down to the bottom of the page and click on Plugin Browser/Installer.
4.In the search box, type AddThis, and click Search.
5.Look for the plugin that says AddThis and click on it.
6.In the pop-up window, click Install Now.
7.On the Install page, click the Activate Plugin link
8.(Optional) In Settings > AddThis, add your AddThis.com username, and customize freely