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What is a Twitter Hashtag?

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Question: What is a Twitter Hashtag?
Answer:

A Twitter hashtag is a keyword preceded by the # symbol used in a tweet. Hashtags help Twitter users quickly find content related to a specific subject. For example, a Twitter chat about the Olympics might use the hashtag #olympics. Each tweet related to that topic would begin with #olympics.

Using a hashtag makes it easy for anyone looking for tweets related to that topic to find them through the Twitter search funtion. Twitter users often pre-arrange "tweet chats" around a specific Twitter hashtag. Tweet chats can be conducted through the Twitter search feature or through tools such as TweetChat, TweetGrid, or TweetDeck.

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