WordPress is a blogging tool and content management system. It is free and written as open source using PHP and MySQL. Most of the websites in the world with a CMS use WordPress, according to a survey from W3Techs.

Bloggers are typically interested in achieving high rankings from major search engines like Google. Search engine optimization is a class of techniques used to improve a website’s ranking.

WordPress uses an architecture that makes it easy to install plugins, which are additional programs that provide WordPress with more functionality. Many of these plugins allow WordPress users to perform SEO functions.

Read more: http://www.graphicmania.net/top-5-wordpress-seo-plugins/