This is a draft feature, meaning that just like emails, you will be able to save your Instagram draft and go back to editing it later. We’re not sure why you might need such a feature. Maybe you have multiple posts planned but don’t want to flood your feed, so maybe you create a few drafts to remind yourself to post them later.
Or maybe there’s a scathing post you’re planning to make, but you’ve decided to draft it until cooler heads prevail. Whatever your reason is, this is where the draft feature will come in. In fact we have to wonder what took Instagram so long to bring it to the table, but we suppose better late than never, right?
However like we said, this appears to be a feature in testing and whether or not it will become mainstream for all users remains to be seen, but we do like what we hear and we hope that it will be available to all users in the near future.