To join the webring you have to ask someone that already is in the websring for a token. If they send you one you can enter it below and enter your url and name. You then also have to enter a 'secret' or password that you will have to enter to generate tokens if you want to allow others to join. This way a 'trust tree' is built where the admins can see who was invited and remove the whole subtree in case of abuse.