HASHTAG HARMONY: FIVE RULES TO MAKE YOUR HASHTAGS SING   Social media is now so slick and sassy that the once humble hashtag has become a powerful marketing tool. Every media platform now uses hashtags to engage their audience because a well planned hashtag campaign can take an idea that is good in its inception, and elevate it to extraordinary. Take the ALS charity organization – their hashtag,  #icebucketchallenge took their campaign