While creating your summit, you would like to find out a little more about your attendees than their name and email address which are registration fields by default. You can now add custom registration questions to your registration flow.
Head over to Event Setup > Registration Fields.
Click on Add Field.
Choose between adding short text, long text, URL, drop-down, checkbox and checkbox list.
You can make each question mandatory or optional.
When your attendees answer dropdown questions, you'll get a sweet graph that appears under Reporting > Attendees.
You can find all the answers to your custom registration questions if you export the csv file in Reporting > Attendees.
Note that with dropdown and checkbox fields, users will be able to select only one response to each field.