Brushes are a great way to enhance your Adobe Illustrator creative work.
You can go a long way with Illustrator's basic tools, draw wit the pen or curvature tool. Use the width tool to change the profile of your stroke and so on. But with the right set of brushes – and the flexible way in which Illustrator allows them to be used on vector shapes – you can quickly and easily add texture and character to any piece of work. Brushes are also part of your Appearance and as such you can save Graphics Style using brushes.
In this Adobe spark Presentation I go over how to use Adobe Illustrator brushes as well as drawing with the Blob brush tool