“What does #OOTD mean?” This is a question you have surely asked yourself if you are on social media. There is a good you chance you have scrolled your Instagram, Twitter, or Facebook profile and have seen someone use the #OOTD hashtag. It is one of the most popular hashtags on social media and it has been used over 68 million times (and counting) on Instagram alone. But what does #OOTD mean? Check out the video below!