Some of the reasons you'd want to use Bower: * Your external libraries have dependencies, and having dependencies managed for you is a good thing. * The exter

Some of the reasons you'd want to use Bower: * Your external libraries have dependencies, and having dependencies managed for you is a good thing. * The external components you're using include both JS and CSS, and need to be served separately. * Because you love your users, and want to concatenate your javascript and CSS to single files before serving it out to your users. * Because you're including components that expose SASS mixins you want to use inside your existing code. The hosted vs serving your own libraries is a complicated topic, but the basic answer comes down to "the less requests your clients have to make, the faster things will be".