Dental floss is a type of thread that is used to clean the spaces between all your teeth correctly. Daily flossing is important in order to remove dental plaque and bacteria as well as to prevent gum disease and tooth decay. The key thing to remember when flossing is to be gentle so as not to damage your delicate gum tissue. To hold the dental floss correctly, you can use your middle fingers to stabilize it while using your index fingers and thumb to guide the floss between your teeth and gum line. For more basic tips and oral health information, you can consult your dentist or dental hygienist.