Control charts are graphical tools used in quality control to monitor the performance of a process over time. They display data points in a time-ordered sequence, along with upper and lower control limits that indicate acceptable variation. By analyzing these charts, organizations can identify trends, shifts, or any unusual patterns that may signal a problem in the process. These charts are essential in various industries, including manufacturing and healthcare, to ensure that processes remain stable and within specified limits. They help teams make informed decisions about process improvements and maintain consistent quality in products or services, ultimately enhancing customer satisfaction.