Volunteer registrations will flow into the interactive job & shift summary under Volunteers > Report.
You can also export your volunteer data straight to a CSV file (a spreadsheet) under Volunteers > Export. Select the event inside the grey dialogue box on the left, and then use the check-boxes under "Custom Fields" and "Standard Fields" to choose your columns for the spreadsheet (name, address, phone number, etc). You can even re-arrange the order in which these columns will populate by clicking (and holding) the grid icon next to each field-type as you drag-and-drop it to the proper spot.
When you're ready to download this report, click "Export Volunteer Data."