What is a photocopy of a birth certificate and how does it differ from an original birth certificate?

A photocopy of a birth certificate is a duplicate of the original document made using a photocopier or scanner. It differs from an original birth certificate in that it is not considered a legally valid document for official purposes, such as applying for a passport or driver's license. The original birth certificate is issued by the government and contains official seals and signatures, while a photocopy does not have these security features.