The 3 Signals Mosseri Confirmed
In January 2025 Mosseri said: "The top three signals that matter most for ranking are watch time, likes and sends. So when looking at your insights, pay close attention to average watch time, likes per reach, and sends per reach." He added that likes weigh slightly more for followers (connected content) and sends weigh slightly more for non-followers (Social Media Today, 22 Jan 2025). Nothing he said in 2026 replaced these three.
1. Watch time
What it is: how long people keep watching, shown as average watch time. Where to see it: the Reel's insights (Business or Creator account). How to improve it: a first 1-2 seconds that makes the payoff clear, no slow intro, and a length that fits the idea. More in how Reels watch time is measured.
2. Likes per reach
What it is: likes divided by accounts reached, so it measures how many of the people who saw the Reel liked it. Where to see it: divide Likes by Accounts reached in the Reel's insights. How to improve it: content your existing followers care about; this signal matters most for showing Reels to people who already follow you.
3. Sends per reach
What it is: how often people who saw the Reel sent it to someone by DM, divided by reach. Where to see it: Shares in the Reel's insights, divided by Accounts reached. How to improve it: make Reels people forward to a specific friend ("this is so you", a useful tip, a relatable moment); this signal matters most for reaching non-followers. More in sends per reach explained.
Reach, watch time and sends are private to the account owner. On any public account, the visible proxy is views: Reels the algorithm pushed have views far above that account's average. See what accounts reached means for how Instagram counts reach.
What Mosseri said about the algorithm in 2026
Instagram's head talks about ranking often. These are the statements that matter for creators, newest first:
| Date | What he said or announced |
|---|---|
| 30 Sep 2026 | After a Reel works, build on it: change the format (Reel to carousel or back), answer your audience's questions, or revisit the topic when there's new information. (Mosseri reel, via HeyMark) |
| 3-24 Sep 2026 | Four-part ranking series. Ranking predicts how you'll respond to a post (watch it, share it with a friend). Recency matters a lot, so the feed is "roughly in chronological order". Four principles: originality, recency, breaking content and model size. Creators should watch engagement rates, not total views or likes. (Social Media Today) |
| 10 Sep 2026 | Warned against turning the algorithm off as Australia debated opt-out laws: most users don't enjoy what they find on the other side. (ABC News) |
| 27 Jun 2026 | Testing more ways to reach "Your Algorithm" (pull down in Feed, swipe up on a Reel, more/less buttons): "We want to evolve Your Algorithm from a setting to something that feels central to your experience." (TechCrunch) |
| 30 Apr 2026 | Originality rules extended from Reels to photos and carousels; 75% of US recommendations now come from original posts. (Instagram for Creators) |
| 31 Dec 2025 | Year-end memo: "authenticity is becoming infinitely reproducible". Instagram must label AI content, surface credibility signals and "continue to improve ranking for originality". (The Verge) |
The four principles from September 2026
- Originality: the original creator gets precedence over people who repost the same content.
- Recency: newer posts get more exposure. Post when your audience is around.
- Breaking content: Instagram shows public posts from small creators to people who don't follow them, to see how they respond.
- Model size: larger AI models now take in more signals from a wider range of posts.
His practical advice in the same series: try new formats because what works one week may not the next, use Trial Reels to test ideas on non-followers, and post as much as you can without burning out (Social Media Today, 24 Sep 2026).
Key insight: nothing in 2026 replaced the three signals. The new emphasis is on who made the content (originality), when it was posted (recency), and how you read your results: engagement rate, not raw views.
How Instagram ranks Reels, in its own words
Each part of the app (Feed, Stories, Explore, Reels) has its own ranking. For Reels, Instagram says its most important predictions are how likely you are to reshare a Reel, watch it all the way through, like it, and go to its audio page. The signals behind those predictions, roughly in order, are your recent activity, your history with the person who posted, information about the Reel, and information about the creator (Instagram, Ranking explained).
New Reels then go through a test. Every eligible Reel is shown to a small audience that Instagram thinks will enjoy it, whether or not they follow you; the top performers go to a slightly wider audience, then wider again (Instagram for Creators, 2024). That is why a Reel can sit at a few hundred views or keep climbing for days. If yours stall, run our 8-step checklist for Reels with no views.
Other signals creators watch
Instagram has never published weights beyond the above, so the right-hand column is IShort's editorial judgement, not an official figure.
| Signal | What it measures | Our estimate of weight |
|---|---|---|
| Watch time / completion | How much of the Reel people watch | Very high (named by Mosseri) |
| Sends and reshares | DMs and shares to Stories | Very high (named by Mosseri) |
| Likes per reach | Likes relative to accounts reached | High (named by Mosseri) |
| Audio page visits | Viewers opening the sound's page | Medium (an Instagram prediction) |
| Saves | Viewers saving for later | Medium (not named) |
| Comments | Number and depth of comments | Medium (not named) |
Do sends really count 3-5x more than likes?
No source supports a multiplier. Mosseri's own word was "slightly": likes slightly more for followers, sends slightly more for non-followers (Social Media Today). Make Reels worth forwarding, and don't do arithmetic on the weights; nobody outside Instagram knows them.
See How the Algorithm Treats YOUR Content
IShort lets you sort all your Reels by views and Viral Score. See which of your Reels broke out and which stalled, then reverse-engineer what made the difference.
Install IShort FreeWhat the algorithm won't recommend
Instagram applies its Recommendation Guidelines to Reels and also tries to make some Reels less visible (Instagram):
| Made less visible | What to do instead |
|---|---|
| Low-resolution Reels | Export at full quality; don't re-save through messaging apps |
| Watermarked Reels | Export clean files without another app's logo |
| Muted Reels or Reels with borders | Keep sound (or add captions) and fill the 9:16 frame |
| Reels that are mostly text | Show a person, a demo or motion |
| Reels already posted on Instagram | Make a new cut with new information |
| Content against the Recommendation Guidelines | Check Account Status and request a review |
Original content and recommendations (2026 update)
On 30 April 2026 Instagram extended its originality protections from Reels to photos and carousels: accounts that mostly post unoriginal content are no longer shown in places where Instagram recommends content. It doesn't change what followers see. An account becomes eligible again when most of its recent posts are original over a rolling 30 days, and it can check its standing in Account Status (Instagram for Creators).
Original means you filmed it, designed it, or materially edited it, for example by adding real commentary, new information or a remix. A border, watermark, subtitles or a credit in the caption don't count. Details in our guide to Instagram's original-content rule.
Your Algorithm: what viewers can now control
Since December 2025 viewers can see and edit the topics Instagram thinks they like, and in 2026 Instagram has been testing faster ways to reach that menu (TechCrunch). Mosseri also points viewers to favorites and "Not interested" (Social Media Today). For creators, the takeaway is simple: a clear, consistent topic is easier to match with viewers who chose it. Viewers can retrain their own feed too; see how to reset the Instagram algorithm.
How to optimize your Reels for the algorithm
Maximize watch time
- Open with the payoff: show or say why the viewer should stay in the first 1-2 seconds. Browse Reel hook formulas.
- Keep the pace: cut dead air and anything that doesn't move the idea forward.
- Match length to the idea: a tip doesn't need 60 seconds; a story might. See IShort's reel length data.
- Add on-screen text so the Reel works with the sound off.
Earn sends
- Make it about a person: relatable moments people forward to a specific friend.
- Be useful: cheat sheets, how-tos and frameworks people send to a colleague.
- Surprise or amuse: the moments people want someone else to see.
Earn likes from followers
- Serve your core audience: the topics your followers came for.
- Ask a specific question at the end rather than "drop a comment".
Post recently and often
Recency matters a lot in ranking, so post when your audience is active. Find your window in our best time to post Reels guide, and judge each Reel on engagement rate rather than raw views, as Mosseri suggests. For reference, the median engagement rate ((likes + comments) / views) in IShort's sample of 1,048 Reels with views was 3.2%; see what counts as a good engagement rate.
Using IShort to see what the algorithm rewards in your niche
The algorithm doesn't treat every niche the same. IShort shows what it rewards for your account and your competitors:
- Sort any public account's Reels by views to see which ones the algorithm pushed hardest
- See each Reel's outlier multiple (views vs that account's average)
- Check the analytics slides: posting-time heatmap, hashtags, duration and original audio vs licensed music
- Transcribe breakout Reels to study their hooks, and export everything to CSV
Decode the Algorithm for Your Account
Every account's relationship with the algorithm is different. IShort shows you which of YOUR Reels the algorithm pushed, which it buried, and what patterns separate the two. Stop guessing and start optimizing.
Get IShort - It's FreeSources
- Social Media Today: Instagram chief shares algorithm insights and posting tips (24 Sep 2026)
- HeyMark: Mosseri's three ways to reuse a successful Reel (30 Sep 2026)
- ABC News: Mosseri warns against turning off the algorithm (10 Sep 2026)
- TechCrunch: Instagram is testing more ways to customize Your Algorithm (27 Jun 2026)
- Instagram for Creators: Rewarding original creators on Instagram (30 Apr 2026)
- The Verge: Mosseri's year-end post on AI and authenticity (31 Dec 2025)
- Social Media Today: Instagram shares algorithm insights (22 Jan 2025)
- Instagram for Creators: Helping creators find new audiences (30 Apr 2024)
- Instagram: Instagram ranking explained (2023)
About IShort's data: the 3.2% median engagement rate comes from 1,048 Reels with views among 1,227 that IShort users transcribed (captured 17 Jul-27 Sep 2026). Users chose which Reels to transcribe, so the sample skews toward successful Reels.
Frequently Asked Questions
How does the Instagram Reels algorithm work in 2026?
Instagram predicts how likely each viewer is to watch a Reel all the way through, reshare it, like it or open its audio page, and ranks Reels by those predictions. Adam Mosseri names watch time, likes per reach and sends per reach as the signals that matter most, and says originality and recency also carry weight.
What did Adam Mosseri say about the algorithm in 2026?
In a four-part video series in September 2026 he said ranking predicts how people will respond to a post, that recency matters a lot, and that Instagram values originality, recency, breaking content from small creators and larger AI models. He told creators to watch engagement rates rather than total views, test ideas with Trial Reels, and post as often as they can without burning out.
Do sends count more than likes on Instagram?
Slightly, and mainly for reaching people who don't follow you. Mosseri said likes are slightly more important for connected content and sends are slightly more important for unconnected content. The often-repeated claim that sends count 3 to 5 times more than likes has no official source.
Does the Instagram algorithm penalize reposted content?
Yes. Instagram makes watermarked Reels and Reels already posted on Instagram less visible, and since April 30, 2026, accounts that mostly post unoriginal Reels, photos or carousels are not recommended to non-followers until most of their recent posts are original again.
How long does the Reels algorithm take to push a video?
Instagram doesn't publish a time window. It shows each eligible Reel to a small audience first and widens distribution in steps as the Reel performs, so judge a Reel after a day or two rather than in the first hour.