This website is a community. It's main purpose is to keep an online pedigree database. Creating an account you have access to all the pedigree features of the website. You can create and edit your own pedigrees, which will then be available for all other users of the website. By pooling all efforts into the database a very complete record of the breed's history can be created and easily viewed and researched.
At this moment the website is in Beta testing. While it is very functional since the code has been widely used in another pedigree database, the conversion to the Great Pyrenees flavor is bound to have inconsistencies, mainly in the looks of the interface. The core functionality remains largely unchanged. Any kinks or things that seem to be out of place will be dealt with as the website goes along and develops.
Don't be afraid to register and play around. Any mistakes you might make can be corrected once you learn to use the website. Enjoy and good luck.