Responsive Website Design
Responsive Website Design uses a flexible layout that adapts to different viewport orientations or sizes, so you don't have to create multiple layouts
Responsive Website Design enables that flexibility and ensures that your viewer has a pleasant interaction (UX design focus) with your website.
Ease of navigation (UI) and less time-wasting are vitally important when it comes to the SEO of your website. The major search engines give ranking preference to websites that are responsive.