What is the main purpose of DNA replication?

The main purpose of DNA replication is to ensure that each new cell has an identical copy of the DNA during cell division. This process is crucial for maintaining the genetic continuity of organisms, allowing for growth, repair, and reproduction. When a cell divides, it needs to distribute its genetic material equally to the daughter cells so that they can function properly and inherit the same genetic information as the parent cell. This process involves unwinding the double helix, synthesizing new complementary strands, and ultimately forming two identical DNA molecules, one for each new cell. This fidelity in replication is vital for the integrity of genetic information across generations of cells.