Front-end framework created by engineers at Twitter
Initially created to address the issue of having inconsistent user interfaces across their internal web applications
Has since become the most popular mobile first (responsive) framework on the web
Collection of html, css, js and fonts
Documentation can be found here
Fully responsive out of the box
Consistent design
Easy to use
Compatible with browsers
Open Source
Similar to jquery, there are multiple ways to install bootstrap into your applications:
download the bootstrap files and store them within your project
Use a CDN (content delivery network)
We’ll use the downloaded files options, more information on installing bootstrap can be found here