Responsive design makes your web page look good on all devices ( dekstop, laptop and phones).
It's practically essential after all, one design for all devices,
Creating a website version for each resolution and new device would be impossible,
or at least impractical.
By Using Responsive design there are several benefits such as :
1. Google highly recommends it.
2. Super Flexible and very easy to manage.
3. Excellent user experience.
4. One seo campaign.
5. Saving time, money and design effort.