Definition & Meaning of "tweetheart"in English

What does "tweetheart" mean in social media slang?

It is a blend of "tweet" and "sweetheart," used to describe a user on Twitter (X) who is kind, supportive, or endearing in their interactions, often someone who shares positive content, replies with encouragement, or defends others from negativity. People typically use "tweetheart" as a compliment for a follower or mutual who makes the platform feel friendlier, such as "You're such a tweetheart for sharing that" or "Thanks for being a tweetheart in my replies." The term emerged in the early 2010s within Twitter communities as a playful way to recognize good digital citizenship.