Have a look at that. If you want to quickly and easily add these kinds of elements to your site, bootstrap is amazing. All you do is use the proper class names and bam you got buttons, tooltips, alerts, progress bars etc etc etc.
If making those things is second nature to you then you probably don't need it - but for devs who are better at backend and lost when it comes to frontend/design, it can be a huge time (and money) saver.
Have a look at that. If you want to quickly and easily add these kinds of elements to your site, bootstrap is amazing. All you do is use the proper class names and bam you got buttons, tooltips, alerts, progress bars etc etc etc.
If making those things is second nature to you then you probably don't need it - but for devs who are better at backend and lost when it comes to frontend/design, it can be a huge time (and money) saver.