The sire has been tested for Degenerative Myelopathy, Neonatal Encephalopathy with Seizures, Progressive Rod-Cone Degeneration, and Von Willebrand disease Type I, and is clear, meaning he doesn't carry any of the mutations. The dam has been tested for Degenerative Myelopathy and Von Willebrand disease Type I, and is also clear for them. If you go to the company's website, they have information about the health conditions tested for.
Other things to ask about for a Mini Poodle are OFA hip and knee x-rays. For Berners, they should have OFA hip and elbow x-rays, as well as eye exams by a veterinary ophthalmologist and cardiac testing. PennHIP is another form of hip rating. Canadian dogs, or dogs imported from overseas may have hip and elbow ratings done before being imported, so they might have a different certificate.
Other questions to ask a breeder include: What are your goals for this breeding? Why did you pair these two dogs? How old are the parents? (Large breed bitches shouldn't be bred until after they are mature, at around two years of age.)
General questions include things like "what happens if I can' keep this puppy?" and when to spay or neuter your pup.