This has led numerous web designers to a strategic decision on how to make their websites well suited for mobile: use Responsive or Adaptive Web Design? If you are seeing a website on a phone and it is working easily then it is possibly built in one of these designs only. If it is problematic to view then it is most likely still in the pre-mobile technique of building websites that is called as fixed width design.

Both Adaptive and Responsive can help your website to become ready for mobile use, but in very dissimilar ways and it is important to understand this.