Why it matters
Dental professionals commonly recommend cleaning between your teeth every day. Most people agree with that advice. Few actually do it, because it is easy to forget and easy to put off.
Flossing is a textbook case for habit stacking. You already brush your teeth, so you already have a reliable cue. Attaching flossing to it removes the need to remember.
Your dentist or hygienist knows your teeth best. Ask them which method or tool suits you, especially if you have braces, bridges or sensitive gums.