We are now recommending that all new websites be built using a responsive design. And if you’ve had a website online for more than two or three years, it should probably be rebuilt.
What is Responsive Design?
It’s a way of coding the website using media queries to figure out what the resolution is on the device being used to access the website. If it’s a tablet and there’s not enough room for the regular menu, it might hide the menu and replace it with a condensed version. Ditto if it’s a smartphone, in fact you can choose to hide content that might be too detailed for viewing on a small screen.
Why?
Times have changed considerably. Desktop computers now come with wide screens, and an ever growing percentage of people are using tablets and smart phones to access the web. We now recommend all new websites be responsive.
In 2014, the number of people accessing the internet via smartphones and mobile devices surpassed those using desktops and laptops. And it’s only progressed there there.

Don’t mess with Google
Starting April 21, 2015, Google changed its algorithm making it so that search results would be catered to the device being used. So if your customer is using a smartphone or tablet, they will get results catered to that device (responsive or mobile ready websites).
This was referred to as “Mobilegeddon”, as many feared their hard earned standings would decline unless they updated their website to be responsive. Bing (Microsoft’s search engine) soon followed suit.