DNA is a group of molecules responsible for transporting and transmitting genetic material or genetic instructions from parents to offspring.
DNA polymerase is a member of the family of enzymes that catalyze the synthesis of DNA molecules from nucleoside triphosphate, i.e. the molecular precursor of DNA.
The main function of DNA polymerase is to copy the DNA content of the cell during cell division.
They do this by adding nucleotides to the 3'-OH group of the growing DNA strand.
Thus, the main function of DNA polymerase is to synthesize DNA through replication.