Twitter is trialling a new "notes" feature.
The micro-blogging platform typically limits posts to 280 characters - but it has recently been trialling a new feature that allows users to share "notes" as long as 2,500 words.
Twitter said in a statement: "Since the company's earliest days, writers have depended on Twitter to share their work, get noticed, be read, create conversation - everything but the actual writing.
"With Notes, the goal is to fill in that missing piece."
The trial is set to last for two months, but it's been limited to a small group of people in Canada, Ghana, the UK and the US.
Dr Laura Toogood - who is a social media expert - believes that the trial represents a significant moment for the company.
She explained that it could encourage users to remain on the platform for longer.
Dr Toogood told the BBC: "Adding this extra capability means that Twitter is now in a position to compete with some of the popular blogging platforms and potentially attract a new audience and a different type of user.
"It will also encourage existing users to blog within Twitter, rather than move to other websites for this purpose, which will help to retain their audience."