How Reels recommendations work, according to Instagram
Instagram has published its own account of what decides which reels you see. Read together, the 2023 ranking explainer and the 2024 recommendation reset describe a system creators can plan around.
Most explanations of "the algorithm" are guesses. Instagram's are not, because the company has written down, in plain language, what its Reels recommendations use and what they avoid. The most complete version is a May 31, 2023 post by Adam Mosseri, the head of Instagram, titled "Instagram Ranking Explained." A November 2024 announcement added a reset button. Between them they describe a system with a stated goal, four inputs, a list of things it demotes, and a set of controls the viewer holds.
The goal
Reels are not ranked the way the feed is. Reels, in Mosseri's words, are meant to help people "discover new things, with an emphasis on entertainment." The post notes that a recommended reel is likely to have been made "by someone you've never heard of," which is why the system needs more than a follow graph to work with.
The four signals
The post lists the inputs in order of importance.
First, the viewer's activity: "We look at things like which reels you've liked, saved, reshared, commented on, and engaged with recently." Second, the viewer's history with the person who posted: "it's likely the video was made by someone you've never heard of, but if you have interacted with them, that gives us a sense of how interested you might be." Third, information about the reel itself, "signals about the content within the video such as the audio track or visuals in the video, as well as popularity." Fourth, information about the poster, "popularity signals such as number of followers or level of engagement to help find compelling content."
The order is the point. What a viewer has recently done outranks who made the video, and both outrank the poster's follower count. That is how an account with ten thousand followers can draw millions of views, and how a large account can post a reel that goes nowhere.
What gets shown less
The same post is unusually direct about what the system demotes. Instagram says it is less likely to recommend "low-resolution or watermarked reels, reels that are muted or contain borders, reels that are majority text, or reels that have already been posted." Instagram's Reels feature page adds a length rule: "Reels over 3 minutes won't be recommended to new audiences," even though the recording tools allow clips that "add up to 20 minutes."
Each of those is a decision a creator makes before posting. Exporting through another app that stamps a watermark, reposting a clip that has already circulated, posting a text-heavy slide or an unusually long cut all reduce the pool of viewers a reel can reach, according to the platform's own description.
The viewer's controls
The 2023 post describes the controls that shape recommendations from the viewing side: marking a reel "Not Interested," a test of an "Interested" option for recommended content, the Sensitive Content Control, and "Why you're seeing this" explanations that apply across Instagram.
The November 19, 2024 announcement added a bigger lever. Instagram said it had "started testing the ability for everyone on Instagram, including teens, to reset their recommendations." The reset clears "recommended content across Explore, Reels and Feed," reached from the profile through the content preferences menu. After that, "your recommendations will start to personalize again over time, showing new content based on the content and accounts you interact with," and the reset offers "the option to review the accounts you're following and unfollow any that share content you no longer want to see." The post said the feature "will soon roll out globally."
What it means for a creator
Put the pieces together and the practical advice writes itself. Because the strongest signal is what viewers have recently engaged with, a reel earns its reach from strangers, not followers, and the first viewers' likes, shares and comments decide whether it is shown to the next group. Because the platform says it demotes watermarks, mutes, borders, text walls, reposts and reels over three minutes, the safest format is original, full-frame, with sound, and short. And because a viewer can reset everything, an account cannot count on being remembered; it has to earn the next recommendation with the next reel.
The @deni_nzt account profiled on this site is a clean illustration: about 10,600 followers, seventeen reels in ten days, 10.7 million views, roughly a thousand views per follower. The audience was not there in advance. The system found it, one signal at a time.