Are two separate websites useful when discussing mobile and desktop [duplicate]

1. Should you use responsive designs instead of having separate sites for computers and mobiles?
2. How can I have different websites on my mobile and desktop?
3. Why should a mobile website be different from a desktop website?
4. What are the differences between desktop first and mobile first design strategies?

Should you use responsive designs instead of having separate sites for computers and mobiles?

Responsive sites can also be easier to maintain than separate mobile sites. With just one url, any changes are made to one site vs. having to make changes to go in and update two separate sites. Most importantly, same functionality and content is used on all versions of a responsive site.

How can I have different websites on my mobile and desktop?

Adaptive Design

Adaptive website design is like having two completely different web sites, one designed to fit on your phone the other designed to fit on your desktop. Using JavaScript and other elements different version of you site are served to the user depending on what type of device they are on.

Why should a mobile website be different from a desktop website?

Mobile sites avoid using promotional and marketing graphics and use minimal graphics for navigation. Various types of navigation are available on desktop Web sites. Some are global, so are consistent across a site, while others are contextual and change depending on where users are on a site.

What are the differences between desktop first and mobile first design strategies?

When you start with desktop-first, you can design very broadly and add many features. Then you have to check later which function is really important for mobile. When you start with mobile-first you first start thinking about the most important features, which you can then also give more attention on desktop.