Why particular websites are accepting all the devices screen?

[uthra]

Some websites are accepting all the devices like smartphones,laptops,tablets and desktop.But many website does not opening in that devices properly that means websites are collapsing while opening that website in that devices.Why that particular websites are accepting all the devices screen?

[NicholasK]

They used responsive theme which consists separate css for each device, You wrote in your signature that you are a web design company and your information about responsive web is 0.. strange.

[RH-Calvin]

Websites accepting all devices that is computer, mobile or iPhone is designed with responsive web design (http://seoaddict.org/responsive-design-seo-benefits/). This is a type of design for websites that enables good optimization of your website and helps in website marketing to all all visitors including Global and local.