Google Tag Manager for WordPress is a plugin for the popular CMS/blogging system WordPress.
By enabling this plugin you will be able to use Google Tag Manager on your WordPress website without the need to write any piece of code and any programming knowledge.
Google Tag Manager for WordPress gives you wide control to fire your tags through giving you many so called dataLayer variable.
Please note that this plugin is still in beta. It has not been tested on many websites however it should not give you any headache since it does not do any special hacking on your WordPress website.