Yes, exactly.
When you fill out a form to create a new petition, you will be asked to register five of your friends, who will hopefully support your idea. At least five people are needed. You will have to provide their last name, first name and email address. The five signatories will receive a copy of your petition by email, and they will have to click on a link to accept. When they click on the link, they will be asked for additional information in order to be considered signatories, as will be the case for all other signatories.
Does that answer your question?