Messenger RNA (mRNA) is a type of RNA that plays a crucial role in the process of protein synthesis. It is created in the cell's nucleus by transcribing the genetic information found in DNA. This mRNA then carries the instructions from the DNA to the ribosomes, the cellular machinery responsible for assembling proteins. Once at the ribosomes, the mRNA serves as a template for building proteins by specifying the sequence of amino acids. This process, known as translation, is essential for producing the proteins that perform various functions in living organisms, from structural support to enzymatic activity.