If you have an account at the old Group-Global site you can attach it to the new site. This action will link all the content you published at the old site to your new account so we highly recommend to do this.
Otherwise just click the "Don't show this dialog" button and this message will never appear again. You can attach your account anytime by selecting the item "Attach account from old site" from the user menu.
In order to use the functionality of the site in its entirety, you need to login with your account to Facebook. Press the "Continue" button and fill in the "E-mail" (or phone) as well as the "password" for your account to Facebook. If you do not have an account in Facebook, we recommend that you create it. Otherwise, you will only function with viewing web content.