TweetDeck consists of a series of customisable columns, which can be set up to display the user's Twitter timeline, mentions, direct messages, lists, trends, favourites, search results, hashtags, or all tweets by or to a single user. The client uses Twitter's own automatic and invisible URL shortening whereby a link of any length will only use 23 characters of a Tweet's 280-character limit. All columns can be filtered to include or exclude words or tweets from users. Tweets can be sent immediately or scheduled for later delivery.