External Link

Refers to any website work where the end result is seen by users of the website. This is in contrast to back end development, which is the underlying site infrastructure and code that isn’t seen by users of your site.

Broadly refers to the entire experience that a visitor to your website or app has. User experience also refers to a design approach that focuses on ease of use and testing to ensure that visitors to your site don’t become lost or confused, and can easily understand and navigate through the site’s infrastructure.

A Viewport is the visible area of a webpage. The viewport for a mobile device will be smaller than a desktop screen, and there is considerable variance within device types as well.

Websites need to be responsive to account for differing viewport sizes to avoid massive visual errors and user frustration, which is why responsive web design is so important.