Here's why:

* Transcription is the process of copying the genetic information from DNA into RNA.

* Promoters are specific DNA sequences that act as recognition sites for RNA polymerase, the enzyme responsible for transcription.

* When RNA polymerase binds to a promoter, it signals the start of transcription, allowing the enzyme to begin reading the DNA template and synthesize a complementary RNA molecule.

Think of a promoter like a "start" button for the transcription process.