Instagram is testing a new way to advance through photos, by tapping through posts like you would on Stories, it was reported by TechCrunch. Tapping through posts is meant to eliminate the supposedly cumbersome experience of scrolling, while also displaying the entirety of every post in one tap. The test is currently only being conducted in the Explore tab, with no plans to be implemented in the main feed yet. It’s also not known how widely the test will be rolling out.
Instagram user Suprateek Bose took a screenshot of the feature, which could be a quicker way to move through Explore posts. Given that the Explore tab usually shows posts the algorithm determines is relevant to you, it’s likely that you could be tapping through Instagram posts from friends of friends. Make sure to tap carefully so you don’t double-tap and accidentally like a post, causing any awkward friend interactions.
Source : https://www.theverge.com/2018/10/11/17965512/instagram-tap-next-post-scroll-test-explore