Hashtags are metadata tags used on social networks by placing the # symbol in front of a word or phrase. Hashtags show the popularity of a topic over time and are coded by social media algorithms. They allow users to connect with like-minded people and support causes. Key principles of hashtags include discussing topics, expressing ideas, sharing experiences, and creating trends to appear in searches and grow participation. The document provides tips on using hashtags, such as only using one or two at a time to avoid spamming, using memorable words, and promoting hashtags by repeating them. Hashtags are also useful for journalists as a content source and for live reporting. Geo-tagging and social bookmarking are also discussed. An assignment is