Why does DNA need to make a transcript of itself and what is this transcript called?

DNA needs to be transcribed itself as a mechanism for the multiplication of its molecules, and this transcription process is called DNA replication.

Explanation:

DNA replication is a mechanism that allows it, from one molecule, to obtain two molecules identical to the original. In other words, it transcribes the information from one of its strands to a new strand.

The process of DNA replication is semi-conservative, because each new molecule is formed by an original strand and a new strand, which contributes to maintaining the integrity of the genetic information.

As a requirement of the cell division process, as mitosis,  DNA must replicate so that each daughter cell has the same genetic information as the original cell. This is why replication of this nucleic acid occurs.