The Drupal Content Management System is on of the most used in the world. Based on "Open Source" Technology, Drupal has a large support base
Drupal is used by many Governments and Universities around the Globe. It Modular Design allows Updates and Data Migration easier then most Content Management Systems. With the release of Drupal 8, it is even easier to Migrate Wordpress or other sites to the Drupal Platform.
Responsive / Mobile Design is far important now then it was before as over half of Internet Traffic is done on Mobile and Tablet Devices. Having one Website being accessed through different Devices and Computers is now the industry Standard. It is the process of Content Planning, UI and UX Design, Implementation, and Testing across the various numerous Devices and Browsers.
Google set a line in the sand on April 21, 2015 with their Mobilegeddon. Google started to boost the rankings of Responsive / Mobile Websites and penalize the Website that were not "Mobile Friendly".
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More front end jumbo here. This will get cross linked from Drupal Themer / Front End, Responsive Development and Mobile. This will also apply to custom Front End Development project that are not CMS (content Mangment system) specific (Avi Center). more from https://en.wikipedia.org/wiki/Front_end_development and http://frontenddeveloperjob.com/what-is-a-front-end-developer/ https://css-tricks.com/the-front-end-developers-dilemma/ copy this http://www.toptal.com/front-end