Wordpress is a Content Management System(CMS) or you can say software. Worpress is free and Open Source application based on PHP and MySQL, it is used for create website or app. WordPress is easy to learn and anyone can make simple and attractive website, blog or app from it.
WordPress also provide thousands of themes and plugins to help user to make website in a few minutes. It is flexible to understand and modfiy the themes and plugins as per our requirements.
WordPress also used for e-commerce website to create product base website. WordPress is easy and best solution to make content based site comparing to other CMS.