If you’re figuring out how to grow Instagram followers organically, start with content people finish, send and save. Instagram ranks Reels, Feed and Stories separately, so match each format to its signals.
This guide sits within our wider look at social media marketing, and it focuses on one platform.
| Item | Value |
|---|---|
| Ranking systems on Instagram | One per area: Feed, Stories, Explore, Reels, Search |
| Key Feed ranking factors (as of May 31, 2023) | Four |
| Feed content fuelled by AI (Meta CEO, 2023) | Around 40% |
| Top Reels ranking signals (as of October 12, 2026) | Watch time, likes per reach, sends per reach |
| Reel length recommended to non-followers (as of October 12, 2026) | 3 minutes or less |
These figures come from Social Media Today’s May 2023 explainer and Hanami Social’s Reels ranking summary. Platform rules change, so check the sources before you rely on them.
How Instagram decides who sees your posts
Instagram does not run a single formula. According to Social Media Today’s May 31, 2023 report on an explainer from Instagram head Adam Mosseri, each part of the app uses its own algorithm. That covers Feed, Stories, Explore, Reels and Search.
For growth, that means “beat the algorithm” is too vague to act on. You need to ask which surface you are trying to win, because the signals differ.
In that same report, Mosseri named four key factors that rank the main Feed:
- Your activity, such as posts you have liked, shared, saved or commented on.
- Information about the post, including how popular it is, how quickly people react, when it was posted and any location.
- Information about the person who posted, including how people have interacted with them in recent weeks.
- Your history of interacting with that person.
The report also relays a remark from Meta CEO Mark Zuckerberg that around 40% of the content in the main Feed was fuelled by AI recommendations. In practice, a large share of the Feed is posts from accounts people do not yet follow, which is where new followers can come from.
What Reels reward when you want new followers
Reels are the main discovery format. Search Engine Journal’s January 17, 2022 guide notes that Reels appear in the Explore tab, which gives you a chance to reach people who are not already following you.
According to Hanami Social’s summary of what Meta has shared, updated October 12, 2026, the top three Reels signals are watch time, likes per reach and sends per reach. For people who already follow you, likes are slightly more important than sends. For people who do not follow you yet, sends matter more than likes.
The same Search Engine Journal guide lists what the Reels system predicts about each viewer:
- Whether they will watch the Reel the whole way through.
- Whether they will like it.
- Whether they will say it was entertaining or funny.
- Whether they will go to the audio page to make their own Reel.
Length matters too. Hanami Social reports that videos over 3 minutes will not be recommended to non-followers, so keep growth-focused Reels under that ceiling.
Smaller accounts are not shut out. Later’s guide, updated June 25, 2026, says the Reels algorithm prioritizes watch time and replays over follower count, and that posting consistently matters more than posting perfectly.
How do Feed and Stories help you keep new followers?
Reels bring people in, but Feed and Stories decide whether they keep seeing you. Instagram’s Stories ranking, as described in the May 2023 explainer coverage, rests on your followers’ behaviour with your account:
- Viewing history: how often someone views your stories.
- Engagement history: how often they react, such as sending a like or a DM.
- Closeness: how likely you are to be connected as friends or family.
For Feed, Mosseri gave an example of interaction history: whether you comment on each other’s posts. Search Engine Journal adds that responding to comments, DMs and tags can help your content show up in people’s feeds more often.
The same coverage says Instagram now weights content format, so if someone prefers photos they will see more photos. It also says Mosseri had noted the algorithms prioritize original content. A mix of formats, made by you, is a safe plan.
A repeatable routine for organic growth
The sources describe ranking signals, not guaranteed follower counts. Use them as a checklist for each post:
- Write an opening that earns the next few seconds, because watch time and completion are primary Reels signals.
- Make the Reel worth sending to a friend. Hanami Social says useful, surprising or identity-reinforcing content tends to get shared.
- Export it clean: original footage, full screen, good resolution and no watermarks.
- Add audio, a caption and hashtags. Later’s guide lists audio, captions, hashtags and visual content as Reel information, so a considered social media hashtag strategy supports discovery.
- Reply to comments and DMs in the first days after posting.
- Review which posts earned watch time, likes and sends, and compare them with follower gains using social media analytics metrics as your guide.
Repeat the cycle and keep what works. Social Media Today’s August 4, 2021 piece makes the same point: there is no formula, and success comes largely from trial and error.
Mistakes that quietly limit reach
Hanami Social’s list of quality filters shows what can reduce a Reel’s visibility:
- Low-resolution, blurry or heavily compressed video.
- Watermarks, including TikTok watermarks.
- Videos with borders that do not fill the screen.
- Muted videos, uploaded without audio.
- Excessive text overlay.
- Reposted or non-original content.
The August 2021 Social Media Today report adds that Instagram limits clips re-shared from TikTok, which it identifies by watermark, and discourages political content in Reels. Those are dated statements, so check Instagram’s current guidance before you build a plan around them.
Frequently asked questions
Does Instagram have one algorithm?
Show answer
No. As of Social Media Today’s May 31, 2023 report on Mosseri’s explainer, Feed, Stories, Explore, Reels and Search each use their own algorithm, tailored to how people use that part of the app.
Do likes or shares matter more for reaching new people?
Show answer
For people who do not follow you, sends matter more than likes, according to Hanami Social’s October 2026 update. Likes are slightly more important for reaching existing followers, so both count.
Can I reuse my TikTok videos on Reels?
Show answer
It is risky. Social Media Today’s August 4, 2021 report says Instagram limits the reach of re-shared TikTok clips using watermark identification, and Hanami Social lists watermarked content as deprioritized. Upload an original version without the watermark instead.
Can a small account grow without ads?
Show answer
The sources suggest yes. Later’s June 2026 update says the Reels algorithm weighs watch time and replays over follower count, so smaller accounts can compete. Growth still depends on making content people watch and share.
