Instagram Reels Algorithm: What Instagram Has Officially Said
Instagram says its top Reels ranking signals are watch time, likes and sends. Here is everything it has officially said, kept apart from the common advice.
Instagram8 min read
The short answer
The Instagram Reels algorithm predicts which reels each person is likely to enjoy and ranks them using signals from what people do. Instagram's head, Adam Mosseri, said in January 2025 that the top three signals for ranking are watch time, likes and sends, and told creators to watch average watch time, likes per reach and sends per reach.
Instagram also says new reels are first shown to a small audience of non-followers and widened if they do well, that original content gets better reach, and that some content isn't recommended at all. This guide sets out what Instagram has said, with dates, and keeps it apart from the advice that circulates without a source.
There isn't one algorithm
Instagram's own explainer starts by saying Instagram "doesn't have a singular algorithm". Feed, Stories, Explore, Reels and search each use their own ranking, tuned to how people use that part of the app. The Reels tab is described as built with an emphasis on entertainment, and most of what people see there comes from accounts they don't follow.
That matters for how you read advice. Something that helps a carousel in Feed may not help a reel in the Reels tab, and Instagram's creators FAQ says engagement on each surface matters most for that surface.
The ranking signals Instagram has named
Instagram has described the Reels signals several times. The wording changes, but the core stays the same: how long people watch, whether they like it, and whether they send it to someone.
| Statement | Source | Date |
|---|---|---|
| Top three signals are watch time, likes and sends; watch average watch time, likes per reach and sends per reach | Adam Mosseri, reported by Social Media Today | January 2025 |
| Likes are slightly more important for connected content, sends slightly more for unconnected content | Adam Mosseri, reported by Social Media Today | January 2025 |
| Signals include watch time, retention, shares, likes and comments | Instagram creators blog | February 2025 |
| The biggest factor is engagement per viewer (watch time, sharing, following, liking, commenting, profile visits) | Instagram for Creators FAQ | Current page |
| Most important predictions: reshare, watch all the way through, like, go to the audio page | Instagram Ranking Explained | May 2023 |
| Signals in order: your activity, your history with the poster, information about the reel, information about the poster | Instagram Ranking Explained | May 2023 |
What "connected" and "unconnected" mean
Connected content is from accounts a viewer follows. Unconnected content is recommended from accounts they don't. Mosseri's point was that a like is a slightly stronger signal when your followers see a reel, and a send (sharing it in a DM) is slightly stronger when strangers see it.
Read that as a description, not a formula. Instagram hasn't published weights, and claims you may see that a send is worth a fixed multiple of a like don't come from an official statement we could find.
How a new reel is distributed
Instagram's creators blog (February 2025) says that among non-followers, a reel is first shown to a small audience of people it thinks will enjoy it. As that audience responds, the best-performing reels go to a slightly wider audience, then the best of those to an even wider group, and so on. Instagram presented this as a change that gives creators of all sizes a chance to reach new people.
In practice, the first viewers decide a lot. If they skip in the first seconds or swipe away halfway, the reel has less reason to be shown further.
Originality: what Instagram says
Instagram is explicit that original content does better. Its creators FAQ says: "We encourage people on Instagram to post content that is original to get the best reach and distribution." Its January 2025 creators post called posting original content consistently one of the most effective ways to grow.
According to Instagram's Help Center, simply stitching clips together or adding a watermark does not count as material editing. If you want to share someone else's reel without real changes, Instagram suggests reposting it or sharing it to your Story rather than re-uploading it. Meta's transparency page also lists limited originality content, principally repurposed from other sources, among the things it disincentivizes.
Content that is shown less or not recommended
Instagram has listed the kinds of reels it makes less visible in recommendations. In the 2023 explainer these were reels that are low resolution or watermarked, muted or with borders, majority text, or already posted on Instagram. The creators FAQ adds a direct line: "Ditch the watermark!" because a third-party watermark may be affecting reach.
Separately, Instagram's Recommendation Guidelines describe content it avoids recommending at all, such as unoriginal content repurposed with only minor edits, and sensitive or low-quality content. Meta's transparency page names clickbait and engagement bait as low-quality content. None of this removes a reel from your profile; it limits where Instagram suggests it.
- Low resolution or blurry uploads
- A visible watermark from another app
- Muted reels, or reels with borders
- Reels that are mostly text
- Reels already posted on Instagram, by you or someone else
- Clickbait and engagement bait ("comment YES if...")
Length and eligibility
Length is an eligibility rule, not a ranking boost. Instagram's Help Center says you can record and edit reels up to 20 minutes, but reels over 3 minutes won't be recommended to people who don't follow you. Instagram's January 2025 creators post said reels up to 3 minutes became eligible to be seen by non-followers in the Reels tab and Explore, up from 90 seconds.
Within that limit, a longer reel only helps if people keep watching. Average watch time is one of the named signals, so a 12-second reel watched twice can beat a 90-second reel abandoned at 10 seconds.
Hashtags, audio and trends
Instagram's creators FAQ says it detects trends using factors like audio and hashtags, and that relevant hashtags can help while irrelevant ones can hurt. Mosseri's explainer lists audio among the information about a reel that the system reads, and visiting the audio page is one of the predicted actions.
Instagram has not said that a set number of hashtags helps. Use a few that describe the reel honestly. A clear caption and on-screen text also tell viewers what the reel is about.
How viewers can change their Reels algorithm
Viewers now have direct controls. Instagram launched Your Algorithm for Reels on 10 December 2025 in the US, extended it to Explore in April 2026, and on 10 June 2026 made it live across Feed, Reels and Explore, globally in English. It shows a summary of the topics shaping your recommendations and lets you add topics or ask for more or less of them.
To open it, tap the icon in the top right of Reels or Explore, or go to Settings and activity, then Content preferences, then Your algorithm. Instagram also offers a reset of suggested content, announced in November 2024, from the same Content preferences menu. For a single reel you can also tap Not interested.
Official statements vs common advice
A lot of Reels advice is reasonable but unofficial. Here is how the common claims line up with what Instagram has said.
| Claim | Status | What Instagram has said |
|---|---|---|
| Watch time matters | Official | Named a top signal (Jan 2025) |
| Sends and shares matter | Official | Sends a top signal, slightly more for non-followers |
| The first 3 seconds matter | Official | Creators FAQ: make the first 3 seconds engaging |
| Original content gets more reach | Official | Creators FAQ and Help Center |
| Watermarks hurt reach | Official | Watermarked reels are made less visible |
| Post 10 or more reels a month | Partly | Creators with the most growth post 10+ a month on average; frequency is one factor |
| Use 3 to 5 hashtags | Unofficial | Only: relevant hashtags can help, irrelevant ones can hurt |
| Post at a set best time | Unofficial | Post when your audience is most active, per your Insights |
| Deleting a reel resets your reach | Unofficial | No official statement |
| Sends are worth a fixed multiple of likes | Unofficial | No weights published |
How to read your Insights against the signals
Open a reel, tap View insights, and check the numbers that map to the named signals. Divide likes and shares by accounts reached to get your own likes per reach and sends per reach, and compare reels with each other rather than with other accounts.
In August 2025 Instagram added a retention chart for each reel and began replacing view rate with skip rate: the percentage of views from people who skipped the reel in its first 3 seconds. A high skip rate points at your opening. A steep drop later points at the middle.
Make it in ReelXo
Original edits from your own photos and clips are what the Reels algorithm says it wants, and that is what ReelXo is for. It exports a clean 1080 x 1920 MP4 with no watermark, so nothing on screen marks the reel as made elsewhere. Slow Burn (6 shots, 20 seconds) closes on the frame it opened with, a loop that invites a second watch. ReelXo does not post, schedule or show analytics; you upload the file in Instagram and read the results in Insights.
Frequently asked questions
How does the Instagram Reels algorithm work?
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It predicts which reels each person will enjoy and ranks them using signals such as watch time, likes and sends. Instagram says new reels go to a small group of non-followers first and are shown more widely if that group responds well. Each part of the app has its own ranking.
What is the most important signal for Instagram Reels?
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Adam Mosseri said in January 2025 that the top three signals are watch time, likes and sends. He suggested creators track average watch time, likes per reach and sends per reach, and said sends matter slightly more for reaching people who don't follow you.
Do hashtags help the Reels algorithm?
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A little, if they're relevant. Instagram's creators FAQ says it detects trends using audio and hashtags, and that irrelevant hashtags can hurt engagement and distribution. Instagram has not recommended a specific number, so use a few accurate ones.
How do I reset my Instagram Reels algorithm?
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Go to Settings and activity, then Content preferences. There you can open Your algorithm to add or remove topics, or reset your suggested content to start fresh. Instagram's recommendations then rebuild from what you watch and engage with next.
Why are my reels not being recommended?
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Common official reasons are a third-party watermark, low resolution, a muted or bordered video, mostly text, content already posted on Instagram, or a reel longer than 3 minutes. Unoriginal content and content that breaks the Recommendation Guidelines is also not recommended.
Does the Reels algorithm favour small creators?
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Instagram says it changed Reels so that creators of all sizes have a chance to reach new audiences, with each reel first shown to a small group of non-followers. It doesn't guarantee reach; how that first group responds decides how far the reel goes.