Transient transfection is a technique used to introduce foreign DNA into a host cell for a short period of time. It is a specialized skill that requires expertise in cell culture, genetic engineering, and molecular biology. The objective of transient transfection is to express a gene of interest in the host cell to study its function, regulation, and interactions with other cellular components. It is a powerful tool in biomedical research and biotechnology, particularly in the development of gene therapies, drug screening, and protein production.