A Gene Regulatory Network (GRN) is a collection of molecular regulators that interact with each other and with other substances in the cell to regulate gene expression. These networks control when, where, and how much of a gene product is made, influencing various biological processes such as development, cell differentiation, and responses to environmental changes. GRNs consist of genes, proteins, and regulatory elements that work together in complex ways. They can be visualized as interconnected pathways, where signals from one gene can affect the activity of others. Understanding GRNs is crucial for fields like genetics, molecular biology, and biotechnology.