A "strong promoter" is a term used in molecular biology to describe a DNA sequence that can turn on gene expression at high levels. There are several synonyms to describe a "strong promoter" such as potent promoters, powerful promoters, robust promoters, active promoters, highly efficient promoters, and hyperactive promoters. These synonyms are used interchangeably and convey the same meaning indicating the strength of a promoter. The strength of a promoter plays an important role in gene regulation and gene expression studies. Promoters with high activity can result in a high level of the gene product, that can be used for research purposes, or in the development of pharmaceuticals or biotechnology products.