# How the Instagram Algorithm Works: Feed, Reels, Stories, and Explore

URL: https://socialboostexpert.com/blog/how-the-instagram-algorithm-works-feed-reels-stories
Updated: 2026-10-31

> What Instagram and Meta say determines the ranking of posts in Feed, Stories, Reels, and Explore, signal table, myths about shadowban, and practical advice for content.

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## How the Instagram Algorithm Works in Feed, Reels, Stories, and Explore
Instagram does not have a single algorithm but several systems with their own signals. We explain, based on official sources, what determines ranking in Feed, Stories, Reels, and Explore and what this means for your content.
The Social Boost editorial team · Published October 31, 2026 · Last reviewed October 31, 2026 · 7 min read
### In short
- Instagram uses separate ranking systems with different signals for Feed, Stories, Reels, and Explore.
- The system estimates how likely you are to take a specific action with a post, such as watching it fully, saving it, sharing it, or skipping it.
- For Reels, watch time plays a major role: whether the viewer leaves within three seconds or watches the video to the end.
- Non-original, blurry, or watermark-labeled content may lose recommendations to new audiences.
- Instagram does not specify an ideal time or number of hashtags in these sources; the best way to find out is from your own statistics.
The Instagram algorithm is not a single formula but several systems: Feed, Stories, Reels, and Explore each rank content according to different signals. All estimate how likely you are to take a specific action with a post, such as watching it fully, liking, saving, sharing, or skipping it. The higher the probability of actions Instagram values most, the higher the post appears.
### What exactly is the Instagram algorithm?
The Instagram algorithm is a set of artificial intelligence models that select and rank from thousands of possible posts those you are likely to want. Instagram itself in its ranking explanation
emphasizes that it does not use a single algorithm but a series of processes for different parts of the app.
The process is basically the same everywhere. The system first gathers candidates, then removes content violating rules, and finally assigns a score based on the estimated reaction. For example, for Explore, according to Meta’s system card,
it processes up to 1,500 candidates in three ranking phases, and for Reels it finally scores about 100 videos (status as of October 2026).
A signal is any information from which the system estimates your reaction: what you liked before, how long you watch videos from a given author, how old the post is, or how many people have already reacted to it. Additional terms can be found in the glossary
.
### What signals determine the Feed, Stories, Reels, and Explore?
Each part of the app prioritizes different signals: Feed and Stories mainly rely on your relationship with the accounts you follow, while Reels and Explore focus on discovering new content. The following table summarizes the main signals in order of importance as stated by Instagram (article from May 2023, verified as of October 2026).
App section Main audience Main signals by importance
Feed Followed accounts and recommended posts your activity (likes, shares, saves, comments); post information (popularity, time of posting, location); author information; your interaction history with the author
Stories Followed accounts viewing history; interaction history (likes, messages); closeness of relationship with the author
Reels Primarily accounts you do not follow your activity (likes, saves, shares, comments); history with the author; video information (sound, image, popularity); author information
Explore New accounts and content to discover post information (mainly popularity here); your activity in Explore; history with the author; author information
The order and weight of signals may change. The current description can be found in Meta's Transparency Center, where each app section has its own system card.
### How does the Reels algorithm work?
Reels (short vertical videos) are ranked mainly based on how long the viewer watches them and what they do with them next. According to the system card for Reels
the system estimates (status as of October 2026):
- the probability that the viewer watches the video for less than three seconds,
- the probability that they watch more than 95% of the video,
- the probability that they share the video within or outside the app,
- the probability that they comment, use the video's sound in their own content, or start following the author.
The practical conclusion is: the first seconds and whether the video holds attention until the end are decisive. A short, clearly focused video that the viewer watches fully has a better starting position than a long video with a slow start.
#### What this means for creating Reels
- In the first three seconds, show what the video is about (result, question, problem).
- Adjust the length to the content; do not stretch the video with filler.
- Record in high resolution and without watermarks from other applications.
- Use sound; muted Instagram videos are listed among those that may have limited recommendation.
- In statistics, monitor average watch time and shares, not just the number of views.
### How does Instagram rank posts in the Feed?
In the Feed, the system combines posts from followed accounts with recommendations and ranks them based on the estimate of whether you will skip the post or engage with it. System card for Feed
among other things, indicates estimates whether you will click through the entire carousel (a series of photos in one post), how long you will view the post or the author's profile, whether you will send the post in a message, and whether you will turn on sound for the video (status as of October 2026).
For sharing in messages, the card also mentions a signal indicating whether the content is informative, such as tutorials or product reviews. For businesses and sole proprietors, this is good news: a useful post that people share further has its logic in the Feed.
### How does a post get into Explore?
Explore is a section for discovering content from accounts you do not follow, and unlike the Feed, the popularity of the post itself plays a major role here. The system estimates whether you will spend at least five seconds on the post, save it, share it, comment on it, start following the author, or choose Not Interested.
There is no button to “get into Explore.” Practically, this means creating content that people outside your followers watch completely and save, and sticking to a topic so the system knows whom to offer it to.
### Which myths about the algorithm are not true?
There are many “rules” circulating about the algorithm that official sources do not confirm. Here are the most common:
- Shadowban. Shadowban is a term for secretly limiting an account’s reach without notification. Instagram states that secretly limiting accounts is not its intention and that it is in its business interest for creators to reach their audience. However, reach can be reduced, typically when community guidelines or recommendation policies are violated. Whether your content is eligible for recommendation is shown by Account Status in settings.
- Ideal posting time. Posting time is one of the signals in the Feed, but Instagram does not provide a universal ideal hour in these sources. In professional account statistics, check when your followers are active and compare different times over several weeks.
- Number of hashtags. Official explanations do not list hashtags among the main signals nor recommend a specific number. Verify this with your own data.
- Reposted content works the same way. According to original content guidelines,
an account that mainly posts reposted content without significant modification may not be recommended to new audiences. Eligibility can return when a significant share of new posts is original within 30 days (status as of October 2026).
Instagram also lists what can limit video recommendations: low resolution, watermarks, muted sound, borders around the video, mostly text content, and duplicate posts.
### Do purchased likes or views help the algorithm?
They cannot be relied upon because the algorithm estimates reactions of specific people to whom the post is shown, and purchased interactions do not express their interest. Meta Community Standards
apply to Facebook, Instagram, Messenger, and Threads and their spam section
prohibits the sale, purchase, and exchange of interactions such as likes, views, or followers. Therefore, reach or account restrictions cannot be ruled out.
Purchased interactions do not replace content, do not guarantee audience interest, sales, or reach, and should not be considered a way to meet monetization or verification requirements. Additionally, they may worsen the ratio of reactions to followers if new content does not engage. The same is explicitly stated by terms and conditions
in article 3.3: platforms do not allow the purchase of interactions and account restrictions cannot be ruled out. The topic is discussed in more detail in the article Buy Instagram followers: what it brings and what the risks are
.
### When paid promotion makes sense and when it does not?
A package can help as initial social proof for a new profile that already has quality and regular content, or as support for a specific video or campaign alongside your own content work. For example, views on Instagram
or followers on Instagram
can visually strengthen the profile, but they do not replace the algorithm or the real audience.
It does not make sense if content is missing or weak, if you want to meet monetization or verification requirements, if the account already has warnings or restrictions, or if you expect sales and genuine audience reactions. If, after considering the risks, you decide on a package, you can find options in the price list
.
### Frequently asked questions
#### Does Instagram show posts chronologically?
The default Feed is ranked by an algorithm estimating what interests you. However, you can switch to the Following view to see the most recent posts from accounts you follow. Instagram describes this option in its system card for Feed and Reels.
#### Do hashtags help get a post to more people?
Instagram’s official ranking explanation does not list hashtags among the main signals for Feed, Reels, or Explore, nor does it recommend a specific number. If you use them, choose a few that precisely describe the content and compare in the post’s statistics how much reach came from people who do not follow you.
#### Why is my reach on Reels lower than before?
There can be several reasons: viewers skip the video quickly, the content is reused without edits, it has a watermark from another app, low resolution, or is mostly text-based. Also check Account Status in settings, where Instagram shows if your content is eligible for recommendations. Then compare watch time on older and newer videos.
#### Where can I find out why I see a particular post?
Open the menu with three dots on the post and select the option explaining why the post is shown to you. You can also influence your recommendations by choosing Not Interested, setting sensitive content preferences, hidden words, or adding accounts to Favorites. Availability of options may vary by device.
#### Do purchased likes improve a post’s position in the algorithm?
You cannot rely on that. The system estimates how specific people will react to the post, and purchased interactions do not reflect their genuine interest. Meta’s Community Guidelines prohibit buying likes, views, and followers, so there is a risk of reach or account restrictions. Long-term reach is mainly influenced by content that people watch fully, save, and share.
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### Sources
- Instagram Ranking Explained – Instagram
(checked October 31, 2026)
- Instagram Feed AI system – Meta Transparency Center
(checked October 31, 2026)
- Instagram Reels Chaining AI system – Meta Transparency Center
(checked October 31, 2026)
- Instagram Explore AI system – Meta Transparency Center
(checked October 31, 2026)
- Original Content Guidelines – Instagram for Creators
(checked October 31, 2026)
- Community Standards – Meta Transparency Center
(checked October 31, 2026)
- Spam – Community Standards, Meta Transparency Center
(checked October 31, 2026)
Prepared by our editorial team with AI assistance and checked against the sources above. Platform rules change: always check the current wording at the source. This article was translated with AI assistance. The sources are in their original language.
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