The outcome of DNA replication is two DNA molecules consisting of one new chain and one old chain of nucleotides. This why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, and half is brand new.
DNA replication is the copying of DNA within the nucleus of the cell so that two full copies are present. This occurs before a cell divides. Two copies of a cell's DNA need to be present before the cell divides so that each of the resulting daughter cells will have one full copy of the parent cell DNA.
