Twitter now supports up to 280 characters or Unicode glyphs in tweets. Despite this increase from the original 140-character limit, it’s suggested to aim for 71 to 100 characters to maximize engagement. Tweets that stretch between 240-259 characters often see increased interactions, such as retweets, likes, replies, and link clicks. Using one or two hashtags, each no more than 6 characters long, can also boost engagement levels over tweets with more hashtags. Furthermore, crafting tweets that are readable at a 6th to 7th-grade level can make them more shareable across social media platforms.
