Some days ago we only use static website. It was really boring to handle html code. After some days people use CMS like WordPress, Joomla etc. Now most of people use smartphone or mobile phone, Teb, Laptop. So it is important to lode our web site correctly for our visitor. In this case you must use a Responsive Theme what lode properly in any device. So many mobile web development company have who can help you in this case. You want to know that web design is not easy. You should know html, css, php, mysqel etc. It is a long tram process. If you want your web site will lode all mobile phone properly you should use mobile web development. They are fast, trusted, and responsible for their work.