To finish the modeling section, we will see the tools related to edges. We will be mainly using three of the tools, which are the basics for starting your work. Personally, I find working the edges is a great method of modeling, and these tools will help release the potential of them.
Don't waste time manually smoothing and refining edges. This tool will do it for you quick and easy:
The edge beveling is something very useful in order to get nice details or solve more or less complex situations. When you apply this tool, the edges selected from the model will get a nice bevel that you can control using the handle. The more you drag, the bigger the bevel. Also, in the Properties panel you can control certain aspects of the action, being the main parameter the "round level", which in fact is the number of subdivisions of the beveling. The more the number of levels, the more defined the beveling will be.