Twitter trend definition: Twitter trend refers to a topic on Twitter that is popular among users at a specific time or place.
Twitter trends can be seen next to a user’s news feed:
Twitter trends are aggregated based on the volume of people discussing a topic in their Tweets in a geographical location, and how relevant it is to a user.
This means a topic that is trending worldwide may not be displayed to a user with no interest in that subject. Likewise, a topic that is only relevant in San Diego may not be displayed to a worldwide audience.
Marketers who use Twitter’s managed advertising can also purchase promotion for relevant trends.