The sudo command allows any user within the sudo group to run commands as another user. By default, sudo will run as root, but you can specify any user you want. If you plan on using a Linux operating system, you will likely use this command quite a bit.
You will most likely use this command when you run a command requiring root or super user privileges. For example, many user administration commands will need the user to have root privileges to run. In less likely scenarios, you may need to use a different user to run a specific command.
This tutorial covers most of the basics for using the sudo command on a Linux operating system. For example, we cover the syntax, options, and a few use-cases.