In expo events, you have the ability to determine where an exhibitor is directed when they click "Register Now" to complete registration and payment. There are a couple of different options; choose what makes the most sense for your organization.
Direct to a form on your website
If you are able to take registrations on your website, we recommend linking that page here. This allows you to have complete visibility into who is registering and may integrate with your existing database to make followup for this event and notifications for future events easier. Using your website allows you to create an experience that is consistent with your brand.
If you are using a form from a service like Wufoo or SurveyMonkey, you can link out to that registration form in the Registration URL field as well.