A good recap by Sitepoint about why you should use Bootstrap for your web projects. In summary:

  1. It's a powerful and flexible grid system which works beautifully on all screen sizes

  • It's fast and easy to 'plug it into' your website
  • It's compatible with all modern browsers and IE 8 and above
  • It offers many ways to customise its default layout and design
  • It's an open source project so there are no licence fees to pay.