A 384-well plate is a laboratory tool used for high-throughput screening and experiments. It consists of 384 small wells arranged in a grid format, allowing researchers to conduct multiple tests simultaneously. Each well can hold a small volume of liquid, making it ideal for assays, drug discovery, and other applications in fields like biotechnology and pharmaceutical research. These plates are typically made from materials like polystyrene or polypropylene and can be used with various types of samples, including cells, proteins, and chemicals. The compact design enables efficient use of reagents and minimizes waste, making it a popular choice in modern laboratories.