For more than a decade, Instagram defined what aspirational social media looked like: square photographs, perfectly composed grids, an interface that made every user a curator. Then, in late 2019, a competitor that had nothing to do with photography began consuming the attention of Instagram’s most coveted demographic. By August 2020 the response was on every iPhone home screen: Instagram Reels, the short-form video product that has since become the focus of more engineering, design and marketing investment than any other Meta initiative besides the metaverse — and arguably more consequential than the metaverse for the company’s day-to-day business.

The Strategic Crisis That Forced the Pivot

In 2018, Instagram comfortably owned the under-thirty social audience in most of the West. By the end of 2019, internal Meta dashboards were tracking an alarming pattern: time spent per session by U.S. teenagers had stopped growing for the first time since the iPhone era began. Internal documents disclosed during the Facebook Papers reporting indicated that growth in attention from younger users was being captured almost entirely by TikTok. A May 2020 internal memo from then-head-of-Instagram Adam Mosseri stated bluntly that the company was facing “an extinction-level event” if it did not adapt to short-form video.

The Reels response was developed inside Instagram in roughly six months. The product launched first in Brazil in November 2019, expanded to France and Germany in mid-2020, and rolled out globally on 5 August 2020. Mosseri later admitted publicly that the team had been caught flat-footed and that the project consumed roughly half the company’s product attention during its first three years.

From “Side Tab” to the Primary Product

The architectural change was not incremental. Reels was initially a small button at the bottom of the Stories camera. Within twelve months it had migrated to a dedicated bottom-nav slot. Within twenty-four months, Reels content was appearing throughout the feed, the Explore tab and even the messaging product as forwards. Today, by Meta’s own disclosure, more than half of all time on Instagram is spent watching Reels. Photo posts to the main grid have declined every year since 2020 as a share of overall content uploaded.

This rebalancing has not been costless. A vocal portion of Instagram’s older user base — particularly photographers and visual artists — described the pivot as a betrayal of the application’s founding aesthetic. Kylie Jenner, with more than three hundred million followers, briefly amplified a petition titled “Make Instagram Instagram Again” in July 2022 that called on the company to stop pushing video. Mosseri responded with a video apology and a temporary slowdown in feature rollouts, but the strategic direction did not change.

The Recommendation Engine Built in a Hurry

The first generation of Reels suffered from an obvious problem: its recommendation system was not as good as TikTok’s. Users complained that the same handful of large creators dominated the feed and that personalisation took longer to develop. Meta’s engineering response was a wholesale reorganisation of its discovery infrastructure. In an October 2022 letter to shareholders, Mark Zuckerberg disclosed that the company was rebuilding its recommendation stack around large transformer models — the same architecture that underlies generative AI — to produce a unified relevance score that could be applied across surfaces and across both Facebook and Instagram.

By mid-2023, the closure of the engagement gap with TikTok had become visible in third-party analytics. Sensor Tower and Apptopia reported that average time spent on Instagram per day in the United States rose from approximately twenty-eight minutes in 2021 to thirty-three minutes in 2024 — almost entirely on Reels. Meta’s own commentary indicated that recommended Reels now accounted for around forty per cent of all time spent on the application.

The Music Industry Bet

From the outset, Reels was designed to be a music-first product. Meta signed expansive licensing agreements with the three major labels and, crucially, with the leading publishers and performing-rights organisations in markets such as Brazil, India and Mexico. The result is that Reels offers a deep catalogue of pre-cleared sounds — significantly larger than what is available on Facebook’s main feed — and a creator can recycle a piece of audio from a published Reel into their own.

Labels have responded as they did to TikTok: with explicit marketing strategies that seed sounds to creators in the hope of catalysing a trend. Universal Music’s 2023 dispute with TikTok over royalty rates, which led to a temporary catalogue blackout on the rival, was widely interpreted as an opportunity for Reels. During the months of the dispute, Reels reportedly grew its share of music-driven content noticeably, and several catalogue songs charted on Spotify almost entirely on the back of Reels usage. Universal and TikTok later settled, but the message that Meta could compete for music attention had been delivered.

Threads, the Plot Twist Inside the Pivot

The story of Reels cannot be told without a footnote about Threads, Meta’s text-based product launched on 5 July 2023 in response to the upheaval at Twitter following Elon Musk’s acquisition. Threads was an Instagram team project, leveraged the Instagram social graph and was launched as a standalone application in the App Store and Google Play. It reached one hundred million sign-ups within five days, the fastest application launch in history at the time.

Engagement subsequently dropped sharply in the weeks after launch and the company spent eighteen months rebuilding the product before re-acquiring momentum in 2024. By the time Threads opened a public API and began federating with Mastodon in 2025, monthly active users had risen back above two hundred million. Threads is not strictly a Reels story, but it is the same story: a Meta team identifying an attention vacuum left by a rival’s mis-step and moving aggressively to fill it.

Creator Monetisation: The Long Catch-Up

Reels arrived without a meaningful direct monetisation product. The Reels Play Bonus, launched in 2021, paid out hundreds of millions of dollars to invited creators on a relatively opaque formula. The programme was wound down at the end of 2022. Since then, Meta has tested and re-tested a series of monetisation mechanisms — branded content tagging, the Subscriptions product, the Creator Marketplace, paid messaging — without yet landing on a single dominant formula comparable to YouTube’s AdSense share.

In 2024 the company launched a revised ads-revenue-share product specifically for Reels, modelled on YouTube Shorts’ approach. Creators must meet a minimum follower and engagement threshold and earn a share of revenue from advertisements served alongside their content. Early reporting from creators on platforms such as Instagram suggested that earnings remained well below what comparable YouTube content could generate, though the gap was narrowing.

Where Reels Has Caught On Most Strongly

Reels’ geographic distribution differs from TikTok’s. Brazil and Mexico are particularly strong markets, partly because Instagram’s photo-era footprint was already enormous in those countries. India became a decisive battleground when the country banned TikTok in June 2020: Reels and YouTube Shorts split the resulting attention vacuum, with Reels capturing roughly half of the displaced minutes according to Comscore figures from 2021. In Europe, Reels has effectively co-existed with TikTok rather than displacing it, with users in Germany, France and the United Kingdom often maintaining heavy use of both.

In the United States, Reels has become the primary engagement engine for Instagram and a meaningful share of users now describe their daily Instagram session as “watching Reels and DMs” rather than browsing the photo feed. Among Hispanic-American users, Reels has been particularly resonant — a function of strong Latin-American creator ecosystems and aggressive label promotion of Spanish-language music.

The Generative AI Integration

The most consequential product shift for Reels since launch has been the integration of Meta’s generative AI tools. Beginning in late 2023, Reels editors gained access to AI-powered background-swap, text-to-style filters and a series of generative effects that allow creators to compose short videos without filming new footage. The Meta AI assistant can be invoked inside the Reels editor and the Stories camera.

This has implications beyond a feature list. By embedding generative tools at the point of creation, Meta lowers the cost of production for casual users and increases the volume of content the recommendation system can choose from. It also creates a new debate, parallel to the one in the music industry, about the role of AI-generated content in human social spaces. Meta announced in 2024 that synthetic content created inside its tools would be labelled, and that labelling would extend to third-party AI-generated material flagged by metadata or detection.

What Reels Tells Us About Meta’s Defensive Strategy

The most useful way to read the Reels project is not as a product innovation but as an institutional response to an existential threat. The story is familiar: Microsoft’s response to Slack with Teams; Google’s response to ChatGPT with Bard and Gemini; Amazon’s response to Walmart’s e-commerce in the late 2010s with same-day delivery. In each case, an incumbent with extraordinary distribution invested heavily in catching up to a faster rival and used its scale to neutralise the rival’s advantage in distribution-constrained markets.

Meta has done this twice now: first when Snapchat introduced Stories and Instagram cloned the feature in August 2016, capturing the bulk of the attention; second with Reels in 2020. The first cloning was successful and Snapchat’s daily active users plateaued. The second cloning has been more mixed — TikTok has not plateaued, but neither has it displaced Instagram in the way many observers predicted. The two applications now co-exist as the dominant short-form attention products on the planet, each with more than a billion users.

What Comes After Short-Form Video

Internally, Meta is preparing for the next attention shift before the current one runs out of room. The same engineering teams that rebuilt the Reels recommendation stack are now applying their work to augmented-reality glasses and to multimodal AI assistants. The hypothesis is that the unit of consumption may evolve from a fifteen-second vertical video to something more conversational — a series of AI-generated visualisations, perhaps, or a feed of personalised audio summaries.

Whether or not that hypothesis is right, the Reels project will leave permanent fingerprints on Instagram. The application is no longer a photo-sharing community. It is a video-first, algorithmically curated entertainment platform with a messaging product on top. For better or for worse, almost every product decision the company makes for the next decade will be downstream of the choices it made in 2020 to chase a rival that had taken its lunch in plain sight.

Sources cited or referenced in this article include public disclosures from Meta Platforms, internal documents released during the Facebook Papers reporting, statistical analyses published by Sensor Tower, Apptopia and Comscore, and academic discussion of recommendation-system economics published by MIT Sloan Management Review and the Knight First Amendment Institute.