meta name="viewport" Element
Setup the Viewport for Mobile Devices
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />
width=device-width sets the width of the viewport to the devices actual width.
initial-scale=1.0, maximum-scale=1.0 sets the scale of pixels to 1px per actual pixel (1:1) .
user-scalable=0 disables the users ability to scale the pixels.