Twitter being unique with its micro blogging feature with 140 character limit is about to make a big change to the way that tweets work. From September 19th, the company is providing extra room for text thus giving the users more flexibility in composing their messages.
Media attachments (images, GIFs, videos, polls, etc) and quoted tweets will no longer reduce the count. Though the company first announced plans to stop counting photos, videos and user polls toward the limit back in the May, but gave no confirmation date on when the shift occurs.
There is another new adjustment coming up to the character limit, usernames will no longer count when they are at the beginning of replies. It is not clear whether all these changes will occur simultaneously but some of the content types may gradually stop counting against the character limit. But the company will at least kick off the move on September 19th.