These are birth certificates, marriage certificates and death certificates. The birth certificate will give you parents names. You can get birth certificates back to 1910 for sure, usually as far back as 1880's. Death certificates will sometimes give you the names of parents and birthplace, and will usually tell you where the person is buried. These are generally available from the 1880's.
Marriage certificates are more dicey.
The information contained in them varies widely, with later years providing more information. Some tell the place of birth, parents names, and even parents' place of birth. Now you can look for other records that are available for your research. These will run the gamut of accuracy and should not be used as conclusive proof, but they can give you valuable clues. I highly suggest you document every piece of information you get.