Mobile Friendly - Responsive Header/Footer Images
Example code for getting your large header / footer images to shrink in to the width of a mobile device.
If this is your current header image code:
To be mobile friendly (such as on Android or an iDevice), update the style tag to this:
<img src="image.jpg" style="height:auto;max-width:100%;"
The magic is the section which has been bolded
If you have ad banners served from a third-party such as Google Adsense, update your code to their responsive ad unit
Google Adsense: https://support.google.com/adsense/answer/3213689?hl=en