The plugin activity is organized through entities called scans, each one containing its own configuration and results.
Once a scan is configured you can start the crawler from the same edit page, or run it from the scans list screen.
The crawler results page shows all links detected according to the scan configuration.
You can read a detailed user guide and the documentation from the plugin page:
Scan basic configuration
Scan content options
Scan URL filters
Scan HTTP status selection
Scan advanced options
Main scans list
Crawler results page