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Updated:Apr 23, 2026
|Privacy Policy

Twitter/X ownership, feature, and policy changes (2006–2023)

Twitter/X ownership, feature, and policy changes (2006–2023)

  1. First tweet posted during internal prototype

    Labels: Jack Dorsey, Odeo

  3. Hashtag first proposed and used on Twitter

    Labels: Chris Messina, Hashtag

  4. Retweet button begins rolling out

    Labels: Retweet button, Twitter

  6. Twitter becomes a public company

    Labels: Twitter, NYSE

  7. Quote Tweet (retweet with comment) launches

    Labels: Quote Tweet, Twitter

  8. Algorithmic “best tweets” timeline introduced

    Labels: Algorithmic timeline, Twitter

  9. Twitter begins testing 280-character tweets

    Labels: 280 characters, Twitter

  10. Twitter bans political advertising globally

    Labels: Political ads, Twitter

  11. State-affiliated media and government labels begin

    Labels: State-affiliated labels, Twitter

  12. Twitter permanently suspends Donald Trump

    Labels: Donald Trump, Account suspension

  13. Birdwatch launches (later Community Notes)

    Labels: Birdwatch, Community Notes

  15. Twitter removes legacy verified blue checkmarks

    Labels: Blue check, Verification

  16. Twitter drops government and state-media labels

    Labels: Label removal, State media

  17. Twitter rebrands as “X” with new logo

    Labels: Rebrand, X