Facebook-owned photo-sharing service Instagram has commenced the rollout of its new algorithmic-based feed; thereby implementing its March-announced plans to change the way in which it has thus far been showing users' posts --- in strict reverse chronological order.

As a result of the new algorithm-based feed which Instagram is now rolling out, users' posts will now show up "out of order."

The re-ordering of users' feeds underscores a significant move by Instagram because, according to an earlier explanation by the company, the move will basically boost those feeds which are based on the "likelihood you'll be interested in the content, your relationship with the person posting, and the timeliness of the post."

In other words, the change in Instagram's feed algorithm means that older posts from users' friends and other accounts they care about will now appear above those posts which were shared more recently.

As such, the order of posts will essentially be rearranged by the new Instagram algorithm in such a way that the posts which the service deems "best" for the users will get priority over other posts.