Gone are the days when an average 800 X 600 monitor was used by most people worldwide to access websites. At present, there are 5-6 resolutions only in desktops, counting 2k as well as 4k. Apart from that, there are tablets and most importantly mobiles. Smartphones are the primary media currently to access websites. It is very important that your website should be responsive and run properly in all kind of device resolutions. In this article, we shall discuss why it is important to test your website across multiple devices.
https://dzone.com/articles/why-it-is-important-to-perform-cross-device-testin