The Instagram algorithm is the system that decides which posts you see in your feed, your Explore tab, your Reels tab, your Stories tray, and your DMs. It's not one algorithm — it's six separate ranking systems, each tuned for a different surface inside the app.
Instagram has published partial documentation of how the algorithm works. We've combined that with what we observe across our customer accounts to put together a working guide. Here's what actually drives reach, plus how to "reset" the algorithm if your feed is full of content you don't want.
How the Instagram algorithm actually works
Each surface uses its own ranking. The big four:
Home feed. Ranks posts from accounts you follow plus a sprinkling of recommended posts. Signals: how often you interact with the account, how recent the post is, how similar the post is to other content you engage with.
Stories. Stories near the top are from accounts you've DMed, replied to, or watched repeatedly. Newest stories from frequently-interacted accounts go first.
Explore. Pulls from accounts you don't follow, scored on similarity to content you've engaged with. Heavily weighted toward saves and shares.
Reels. Distributes based on watch-through rate, loops, shares, and audio usage. Reach scales over days, not minutes.
The strongest signals across all surfaces: saves, shares, comments, time spent on the post. Likes are the weakest meaningful signal.
How to reset the Instagram algorithm
Instagram added a "reset" option in 2024. Use it when your feed, Explore, or Reels tab is showing content you don't want.
Open the Instagram app.
Tap your profile picture (bottom right).
Tap the three-line menu (top right) → Settings and privacy.
Tap "Content preferences" → "Reset suggested content."
Confirm. The reset takes effect immediately.
The reset wipes your Explore and Reels recommendations, but does not affect your home feed (which is based on accounts you follow). Use it when Explore feels misaligned.
How to manually retrain your feed
If you want to reshape the home feed too:
Tap "Following" at the top of the feed.
Switch between "Favourites" (accounts you starred) and "Following" (chronological).
Unfollow accounts you don't engage with.
Mute (not unfollow) accounts whose content you don't want but don't want to offend.
Use the three dots on individual posts → "Not interested" to send signal.
What the algorithm actually rewards
Six signals, ranked by weight:
Saves. The strongest single signal. A post saved is content the user wants to return to — Instagram treats this as deeper engagement than a like.
Shares (DMs and Stories). A share signals "this content is worth showing other people." Strong distribution lift.
Comments. Especially long-form comments that are not "🔥🔥🔥." Replies to comments compound.
Watch-through rate (Reels). What % of viewers stay to the end. Below 50% kills distribution; above 80% supercharges it.
Profile visits. A user clicking your profile after seeing a post is a strong intent signal.
Likes. Real but smaller. Likes alone don't push a post far.
What hurts distribution
Posting frequency change. Going from 5x/week to 1x/week resets the algorithm's model of you.
Topic drift. Switching topics mid-account confuses the audience score.
Spam hashtags. 30 generic hashtags or banned hashtags throttle reach.
Third-party automation. Auto-likers, mass DMs, follow/unfollow tools.
Non-recommendable content. Posts brushing against community guidelines (clickbait, exaggerated health claims, drug content) lose Explore distribution silently.
Inconsistent timing. Posting at random hours doesn't let the algorithm calibrate.
Recent Instagram algorithm changes worth knowing
Reels prioritised over carousels for new account growth. Reels distribute wider; carousels distribute deeper. For follower growth, Reels win; for engagement, carousels.
Original content boosted over reposts. Instagram explicitly de-prioritises reposts.
Comment quality scoring. A few thoughtful comments outweigh dozens of emoji-only comments.
Send-to-friend signal. "Share to friend via DM" is now one of the strongest distribution signals.
The "Reset" feature. Users can now actively reset recommendations, which Instagram weights as feedback on what to surface.
Algorithm myths to ignore
"You need to post at exactly 9:07 a.m." Time matters, but the minute does not. Window matters; precision does not.
"Engagement pods boost reach." Instagram detects coordinated engagement and suppresses it.
"Adding 30 hashtags maximises reach." 5-10 niche hashtags outperform 30 generic ones.
"Replying to your own comment within 5 minutes tricks the algorithm." No evidence. Reply timing doesn't matter past 60 minutes.
"The algorithm shadow-bans you for unfollowing too many people." Unfollowing is fine; rapid follow-and-unfollow in bursts is what triggers spam detection.
How the algorithm differs by surface
Surface | Primary signal | Best content |
|---|---|---|
Home feed | Follower interaction history | Carousels, single images |
Stories | DM + reply frequency | Polls, behind-the-scenes |
Explore | Topical similarity | Saveable carousels, viral Reels |
Reels tab | Watch-through + shares | Hook-driven short videos |
Search | Hashtag + caption keywords | Posts with clear topic signals |
Practical strategy
Post 3-5 quality pieces per week. Consistency beats volume.
Mix formats. One Reel + one carousel + one Story per week minimum.
Reply to every comment in the first hour. Boosts the relationship signal for everyone who engaged.
Use 5-10 niche hashtags, not 30. Niche hashtags surface to interest-aligned audiences.
Track saves, not likes. If saves are flat or dropping, content needs more depth.
FAQ
How does the Instagram algorithm work?
Six separate ranking systems — one per surface (feed, Stories, Explore, Reels, Search, DMs). Each ranks posts by user interaction history, content similarity, and recency.
How do I reset the Instagram algorithm?
Settings → Content preferences → Reset suggested content. Wipes Explore and Reels recommendations. Doesn't reset your home feed (which is based on who you follow).
What's the strongest engagement signal?
Saves. Followed by shares (especially DM shares), comments, watch-through rate (for Reels), profile visits, and likes (in that order).
Does the Instagram algorithm shadow-ban accounts?
Instagram doesn't call it shadow-banning, but yes — accounts that drift toward non-recommendable content lose Explore distribution without notification. See our guide to shadow bans.
What's the most recent algorithm change?
The "send to friend via DM" signal now carries more weight than likes. Instagram has been pushing distribution toward content that prompts real conversation.
Next steps
If your reach is dropping: audit the last 30 days of posts. Are you posting consistently? Same topic? Strong saves and shares? Cut hashtags to 5-10 niche ones. Drop any third-party automation tools. Reach typically recovers in 2-4 weeks.
For more on Instagram distribution, read how the feed works, Instagram SEO strategies, and shadow bans explained. To post consistently without burning out, use the So-me Studio scheduler.
