You are already invited to register on the forumwhere you will find some additional courses and lab (go to: http://www.boite2.com/forums/sujet/seo-lab/ or http://www.boite2.com/forums/forum/formations-offertes-par-boite2-com/travaux-diriges/) to reinforce your knowledge. You will also have the chance to be guided by professionals in the field through this forum and can ask all the questions you want.
To do so, just register an account with boite2.com, add informations about yourself, validate your registration and access fully to the forum pages.
At the end of these modules you will have the opportunity to take examinations that will be validated by Boite2.com. Certificates will be given but you will see more details about it in the forum.