It is important that your website design must be mobile responsive for it to be search engine friendly because google doesn't display the websites which are not mobile responsive on the results page.
Having a website is not enough if you are in online space. You need well aligned machine to make money online and generate more sales. There are 200+ technical elements the website has to comply for search engine to consider your website to get free evergreen organic traffic.
Additionally, as we said before your website must be easily visible on mobile devices because 80% use mobile devices such as tablets and smartphones to view the web content.
So, when we work on your website; we are designing website for our t business. We pay same attention as it is ours.