Hi Twitter! Many of you (especially in Japan!) have said you'd like to be able to easily + privately save Tweets for later. Right now, people bookmark Tweets by liking, DM-ing to themselves, or Retweeting. But this could be easier. https://t.co/iQ9W9mB1uV — jesar 💭 (@jesarshah) October 9, 2017

For Hack Week @Twitter we started developing #SaveForLater. Here's the early prototype that we put together in a week, which is likely to change. pic.twitter.com/c5LekvVF3l — jesar 💭 (@jesarshah) October 9, 2017

Apparently, they plan to replace the "send via DM" icon on the bottom right portion of tweets with an overflow menu. That menu will house both the "share via DM" and the upcoming "Add to Bookmark" features, though the final version could take on a different form. All the tweets added to Bookmarks can then be accessed through a list in settings.

Shah also revealed that users currently make do by Liking or sending tweets to themselves via DM. When the feature comes out, they no longer have to do either of those whenever they see tweets with photos containing a longer message, those that mark the beginning of a series or those that link to long pieces they'd like to access when they have more time on their hands.