Bootstrap is modular and consists of a series of Less stylesheets that implement the various components of the toolkit. These stylesheets are generally compiled into a bundle and included in web pages, but individual components can be included or removed. Bootstrap provides a number of configuration variables that control things such as color and padding of various components.
We at Just Add Infotech & Services, utilise bootstrap as a tool to make our websites responsive and modern looking across all kinds of devices. Responsive design is an approach to web page creation that makes use of flexible layouts, images and cascading style sheet media queries. The goal of responsive design is to build web pages that change the layout by detecting the visitor’s screen size and orientation.