From Attention to Audience Growth: Engagement Signals and Follower Acquisition on Instagram Reels

Short-form video has become a major content format on social media platforms, yet the relationship between attention metrics and deeper audience-acquisition outcomes remains insufficiently understood. This study analyzes 556 Instagram Reels published by a single creator-operated digital language-education account between October 2025 and June 2026, examining how reach, engagement behaviors, and video duration associate with Reel-attributed follower acquisition. Performance is extremely concentrated: the six most-viewed Reels accounted for 35.8% of total views, while the six highest follower-generating Reels accounted for 79.8% of attributed follows. Attention and audience growth are positively related (Spearman rho = .677) but clearly distinct: among the top decile by views, only 53.6% overlap with the top decile by followers gained. In regression models controlling for reach, duration, and publication month, saves and shares retain significant positive associations with follower acquisition, while comments are statistically insignificant. Longer Reels (90+ seconds) are associated with substantially higher follower-conversion efficiency than shorter formats. An illustrative paired content contrast shows that two conceptually similar videos targeting different languages produced a 77-fold difference in views, while the less-viewed video nevertheless exhibited engagement rates near the sample's upper tail, suggesting that distribution and audience demand may limit reach independently of content quality among those who see it. These findings have implications for content strategy on algorithmically curated platforms and contribute to the growing literature on digital creator engagement.