“What is it? What does it do?”
Bootstrap is a popular framework used for developing responsive, mobile first projects. Originally created by a designer and developer at Twitter in 2010, Bootstrap has become one of the most popular front-end frameworks and open source projects in the world. Prior to its open source debut, Bootstrap was formerly known as Twitter Blueprint.
Bootstrap is used by developers of all skill levels and in projects of all sizes. Bootstrap easily and efficiently scales websites and applications with a single code base, from phones desktops with CSS media queries. Bootstrap is currently used in millions of websites worldwide.