A simple and light process to guide the user through a flow.
A modal is something that opens on top of the current page. It may call for user input or offer deeper details of something.
Modules and widgets
A widget is a subset of information derived from the module. Widgets acts as a link to its module.
A wizard presents a sequence that lead the user through well-defined steps. Use the modal Take-over which gives the user full focus on the task in front of them.