Flat design is a technique that uses simple effects – or lack thereof – to create a design scheme that does not include three-dimensional attributes. Effects such as drop shadows, bevels, embossing and gradients are not used in flat design projects.
Some call the look of flat design simple, although it can be quite complex. The look itself is simple, direct and user-friendly, making it an increasingly popular option for mobile user interfaces as well as trendy web design.
We are seen more and more websites doing a redesign and using flat design as the layout for the site.