Flossing is a dental hygiene practice that involves using dental floss or another interdental cleaner to remove plaque and food particles from between the teeth and along the gumline. Flossing helps prevent gum disease and cavities by reaching areas that a toothbrush cannot effectively clean. It should be done at least once daily, preferably before brushing, using a gentle back-and-forth motion to slide the floss between teeth and curve it around the base of each tooth. Incorporating flossing into a daily oral hygiene routine is essential for maintaining optimal gum health.