Responsive design has been very hot. With Bootstrap, you can easily design responsive pages.

This page itself is a great example of Bootstrap.

Bootstrap is a sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. For more information, you can get to

If you use WordPress, you may easily add a plug-in called  Easy Bootstrap Shortcode. Don’t download and upload to install it. You can just go to your dashboard, Add New Plugin, and search for it to install it without manually downloading and uploading.
This three tabs is a simple example of Easy Bootstrap Shortcode WordPress Plugin.

2) Tooltip example:You may also use it to add tooltip like this: Hover Me

3) Button Shortcode example: a Button with little icon
4)Button Dropdown example: 

5)Icon Heading Shortcode example

Heading of this icon heading example

This is a paragraph that comes with the above heading.