Bootstrap can be used as −

☛ Mobile first approach − Since Bootstrap 3, the framework consists of Mobile first styles throughout the entire library instead of in separate files.

☛ Browser Support − It is supported by all popular browsers.

☛ Popular Browser

☛ Easy to get started − With just the knowledge of HTML and CSS anyone can get started with Bootstrap. Also the Bootstrap official site has a good documentation.

☛ Responsive design − Bootstrap's responsive CSS adjusts to Desktops,Tablets and Mobiles.

☛ Provides a clean and uniform solution for building an interface for developers.

☛ It contains beautiful and functional built-in components which are easy to customize.

☛ It also provides web based customization.

☛ And best of all it is an open source.