topic or A hashtag is any word or phrase immediately preceded by the # symbol. When you click or tap on a hashtag, you'll see other Tweets containing the same keyword or topic. determined algorithmically to be one of the most popular on An information network made up of short messages (including photos, videos, and links) from all over the world. Sign up for an account. at that moment. You can choose to tailor Trends based on your location and who you Subscribing to a Twitter account is called “following.” To start following, click or tap the Follow icon next to the account name on their profile to see their Tweets as soon as they post something new. Anyone on Twitter can follow or unfollow anyone else at any time, with the exception of blocked accounts.... Always-R Glossary.