To make your site mobile & tablet friendly is a big project starting with your site's layout and extending to content presented with the mobile user in mind.
For example,
- Mobile users don't have a mouse. They interact differently with their devices using finger taps and swipe gestures. Links need to be bigger for easier touch access. Same goes for forms.
- Mobile users view in both landscape & portrait mode. Your layout must be able to adjust accordingly.
- Mobile users want to see less content than desktop users.
- Mobile users require fewer images and less bandwidth to save their data plans.
- Then there's the challenge of making images that will be viewed on Hi-Def & hi-pixel density *Retinas* as well as average density displays. So every image in your catalog must be optimized for viewing on multiple devices @1x, @2x, @3x. @4x and so on...
In other words, there is no simple fix for making your site responsive on all devices except to rebuild it.
Nancy