Colonoscopy is a medical procedure that allows a healthcare provider to examine the inside of the colon (large intestine) using a flexible tube with a camera attached to it called a colonoscope. This procedure is commonly used to screen for colon cancer, as well as to diagnose and treat various gastrointestinal conditions such as inflammatory bowel disease, polyps, and ulcers. During a colonoscopy, the physician is able to take tissue samples, remove polyps, and perform other interventions if necessary. Overall, colonoscopy is a valuable tool in the detection and management of gastrointestinal disorders.