Bootstrap includes a responsive, mobile first fluid grid system that appropriately scales up to 12 columns as the device or viewport size increases. It includes predefined classes for easy layout options, as well as powerful mixins for generating more semantic layouts.
Learn more: hhttp://getbootstrap.com/css/#grid
Grid systems are used for creating page layouts through a series of rows and columns that house your content. Here’s how the Bootstrap grid system works:
.container-fluid(full-width) for proper alignment and padding.
.col-xs-4are available for quickly making grid layouts. Less mixins can also be used for more semantic layouts.
padding. That padding is offset in rows for the first and last column via negative margin on