Twitter is testing a new feature that will enable users to submit "notes" of up to 2,500 words.
Normally, postings on social networking sites are limited to 280 characters.
Twitter said that the change was made in response to users using the platform to share images of lengthier announcements and direct followers to external newsletters.
The test will last two months and will feature a small group of authors from Canada, Ghana, the United Kingdom, and the United States.
The new feature intends to retain readers in the Twitter ecosystem by allowing them to view a headline and then click on a link to receive the entire remark.
"Writers have relied on Twitter from the business's early days to publish their work, get seen, get read, spark discussion - everything except the actual writing," the firm stated, announcing the new Notes tool.
"The objective of Notes is to fill in the blanks."
The move follows Twitter's acquisition of Revue, a Dutch newsletter start-up, last year. It said on Wednesday that Revue will be folded into the new Notes platform, which would enable authors to integrate gifs, photographs, and other elements into long-form essays that can be read on and off Twitter.
Dr. Laura Toogood, a social media specialist, said the experiment was a huge step forward for Twitter.
She claims that the function will encourage users to remain on the platform rather than referring to other websites that may hold long-form material.
"With this additional feature, Twitter is now in a position to compete with some of the most popular blogging sites and maybe attract a new audience and a different sort of user," she told the BBC.
"It would also encourage current users to write on Twitter rather than on other platforms, which will help them keep their following."
Following an experiment with a limited sample of users, Twitter expanded the maximum amount of characters for tweets from 140 to 280 in 2017.
The new action comes amid criticism of Twitter's commercial prospects, as Elon Musk's impending acquisition raises doubts about the company's future. The business disclosed in April that it was working on an edit button, soon after Mr Musk, who had requested such a feature, revealed that he had purchased a substantial share in the company.
Twitter said that the two incidents were unconnected.
Mr. Musk has also said that he believes there is potential in a subscription model in which users pay to utilize the site.
Dr. Nikki Usher, a journalism professor at the University of Illinois Urbana-Champaign, said it was difficult to tell if Twitter was experimenting with various forms for profit or with a genuine desire to enhance the site.
"One thing we do know in this situation is that people do not like to read big paragraphs online," she told the BBC.
"So, whether giving individuals 2,500 characters to work with would eventually improve the quality of the digital public realm - I doubt it. Is it an opportunity to make headlines ahead of any big changes at the company? Absolutely."