The role of fiber in digestion is crucial as it aids in maintaining regular bowel movements, preventing constipation, and promoting a healthy gut microbiome. Fiber can be classified into soluble and insoluble types. Soluble fiber helps to stabilize blood sugar and lower cholesterol levels, while insoluble fiber adds bulk to the stool, facilitating easy passage through the intestines. A diet rich in fiber is linked to reducing the risk of digestive disorders, such as diverticulosis and colon cancer.