History

Advantages

Save lots of time — You can save lots of time and efforts using the Bootstrap predefined design templates and classes and concentrate on other development work.
Responsive features — Using Bootstrap you can easily create responsive websites that appear more appropriately on different devices and screen resolutions without any change in markup.
Consistent design — All Bootstrap components share the same design templates and styles through a central library, so the design and layout of your web pages will be consistent.
Easy to use — Bootstrap is very easy to use. Anybody with the basic working knowledge of HTML, CSS and JavaScript can start development with Bootstrap.
Compatible with browsers — Bootstrap is created with modern web browsers in mind and it is compatible with all modern browsers such as Chrome, Firefox, Safari, Internet Explorer, etc.
Open Source — And the best part is, it is completely free to download and use.

"re-usiable code"