Google Publisher Free Plugin for Wordpress sites

Google’s official plugin which adds new functionality to publishers’ WordPress websites. Google Publisher Plugin enables users to easily use Google's products - including AdSense and Webmaster Tools. This is a beta release version 0.1 .0, wordpress version requires: 3.0.0 or higher and compatible up to: 3.8.1. Adding AdSense ads usually requires you to generate snippets in AdSense and paste these into your site, or to manually edit PHP files. This plugin lets you place AdSense ads using a simple point-and-click UI.

This first version of the Google Publisher Plugin currently supports two Google products:

1. Google AdSense: Earn money by placing ads on your website. The plugin links your WordPress site to your AdSense account and makes it easier to place ads on your site -- without needing to manually modify any HTML code.
2. Google Webmaster Tools: Webmaster Tools provides you with detailed reports about your pages' visibility on Google. The plugin allows you to verify your site on Webmaster Tools with just one click.

How to install? 

Downloadlatest version

It’s as same as others wordpress plugin, however follow 3 steps to complete installation process

Step-1: Download the plugin and place it in your '/wp-content/plugins/' directory.

Step-2: Unzip the plugin in the '/wp-content/plugins/' directory.

Step-3: Activate the plugin through the 'Plugins' menu in WordPress.

Source:  Google Publisher Plugin beta: Bringing our publisher products to WordPress