Bootstrap is an open source framework. It is the HTML, CSS, Java Script framework. It is used for the mobile first project on the web. By using Bootstrap, it reflects each user screen resolution. Also, it changes the viewing experience. It is very fast and easy for web developing. It helps in saving of time. Also, it is easy to use and compatible with all the browser. The responsive feature of bootstrap made it more successful. It supports HTML, CSS and JS framework. We go through the different structure in this course like basic, Bootstrap layout, plugins, etc.