The Instagram Algorithm Encyclopedia

Topics · Signal

Shares

Contents
  1. Choosing where and with whom to share
  2. Preparing content to share in Stories
  3. How it has changed
  4. Comparing reshares with likes, views and reach
  5. Predicting reshares to rank Reels
  6. Suggested recipients and personalized sharing controls
  7. See also
  8. References

Shares on Instagram are actions that pass content to other people, such as sending a Reel in a message or putting a Feed post in a Story.12 People can choose an audience and add context to the material they share.34 Sharing helps creators assess audience response and contributes to Instagram’s decisions about which videos to show people.56 Mosseri said in August 2024 that creators assessing performance should examine views and —sending activity relative to the number of people reached.7

Choosing where and with whom to share

Sharing photos and videos on Instagram happens most often through messaging, according to Meta’s Newsroom in September 2025.1 Instagram also describes sharing Reels with people gathered in the same room: casting from a phone to Google TV or Fire TV brings a selected video to the group’s screen, including videos chosen from the Saved tab.8 The item being shared can be an account rather than a post, with Mosseri describing profile cards as a visual, customizable way to introduce an Instagram profile.9 For a smaller intended audience, Mosseri recommends posting to instead of pursuing maximum reach, particularly when concern about performance makes posting stressful.3

Preparing content to share in Stories

Sharing through Stories can start with your own saved material: Mosseri explains that the Story archive is private unless you choose to share something again.10 Instagram’s , disappearing photos shared with friends, are also saved in an archive for up to a year and can be assembled into a Story recap.11 When the material comes from another app, such as Spotify or GoPro, it enters the Instagram camera for editing before publication to a Story or sending through a direct message.12 For a reshared Reel or Thread, Instagram recommends the text tool as a way to explain what is on your mind.4 Story links can direct people to resources, information or products, while reshareable gift-card and food-order stickers let people pass along ways to support a business.1314 For photos restyled with , an Add Yours sticker lets friends apply the same edits to their own images and continue the activity in their Stories.15

How it has changed

  1. 2013

    July

    Instagram introduced web so photos and videos could appear on blogs, websites and articles with attribution to their owner.16

  2. 2017

    June

    Instagram introduced the option to share a completed live-video broadcast to Stories as a replay available for 24 hours.17

  3. 2018

    May

    Instagram announced direct sharing from apps including Spotify and GoPro into its camera, where people could prepare the material for Stories or Direct.12

  4. May

    Instagram added a Story-creation option to the existing post-sharing button, turning a selected Feed post into a customizable sticker.2

  5. 2021

    July

    Mosseri described an experiment emphasizing messaging over Stories for resharing Feed posts, citing tension between what people wanted to share and what others wanted to see.18

  6. 2022

    March

    Meta’s Newsroom announced an Instagram shortcut that let people press and hold the share button to send posts to their closest friends.19

Comparing reshares with likes, views and reach

For Instagram shares, Mosseri’s April 2024 comparison identifies reshares per photo, Reel or carousel alongside likes per post and views per Reel.5 He recommends giving these measures of response more attention than follower count, while acknowledging that accounts with more followers generally reach more people.5 When comparing sharing with viewing, his August 2024 explanation makes another distinction important: one person can view the same piece of content multiple times, so views and reach are not interchangeable.7

Predicting reshares to rank Reels

For Reels discovery, Instagram considers likely resharing alongside the likelihood that someone will watch to the end, like the video or visit its audio page, which can indicate inspiration to make a Reel.6 Most videos in this part of Instagram come from accounts the viewer does not follow, and surveys about whether a Reel was fun or worth watching help Instagram refine its choices.6 Meta’s July 2026 research examined making reshare predictions more consistent by using the same stored information about each piece of content when teaching a recommendation model and when using it to make predictions.20 Meta’s research reported that this reduced the performance gap between those stages by 35%, from 5.24% to 3.42%; the result concerns prediction consistency, not a stated increase in shares or a description of Instagram’s current ranking rules.20

Suggested recipients and personalized sharing controls

Meta research and patents. These may not describe how Instagram works today.

Meta patents address a different part of sharing from predicting a Reel’s appeal: helping someone choose a recipient or a sharing button, without establishing that Instagram offers the proposed interfaces.2122 For the recipient choice, one Meta patent proposes inbox suggestions based on who might enjoy the content and whom the sender has previously sent similar material to.21 For the sharing route, another Meta patent proposes selecting which sharing buttons an app displays using a person’s profile information, with possible cues showing share counts and which social connections shared the content.22

See also

References

  1. 1In India, Instagram debuts a Reels-first experience for its mobile appMeta Newsroom · Sep 29, 2025
  2. 2New: Share Feed Posts to Instagram StoriesInstagram announcement · May 17, 2018
  3. 3Turning off like counts, disabling comments, or using Close Friends are a few good things to try if you’re ever feeling anxious about how your posts are doing on Instagram.Adam Mosseri · Oct 21, 2025
  4. 4Instagram Story IdeasInstagram announcement · Apr 30, 2025
  5. 5Quick thought: Engagement rates are more important than follower counts.Adam Mosseri · Apr 24, 2024
  6. 6Instagram Ranking ExplainedInstagram explainer · May 31, 2023
  7. 7We’re making an update within insights to make “Views” the primary metric for Reels, Stories, photos and carousels.Adam Mosseri · Aug 7, 2024
  8. 8Instagram for TV Gets Bigger, With New Ways to Watch TogetherInstagram announcement · Jun 22, 2026
  9. 9We’re launching profile cards to give you a more visual, customizable way to share your Instagram profile and connect with friends.Adam Mosseri · Oct 15, 2024
  10. 10Hidden Gems - ArchiveAdam Mosseri · Sep 7, 2022
  11. 11Introducing Instants – for sharing in the momentInstagram announcement · May 13, 2026
  12. 12New Sharing to Stories, Camera Effects, Video Chat & Explore Features on InstagramInstagram announcement · May 1, 2018
  13. 13Expanding Sharing Links in Stories to EveryoneInstagram announcement · Oct 27, 2021
  14. 14How to Support Small Businesses During COVID-19Instagram announcement · Apr 15, 2020
  15. 15Restyle your Instagram Stories using Meta AI to Take Your Creativity FurtherInstagram announcement · Oct 23, 2025
  16. 16Introducing Web Embedding Instagram Content on WebsitesInstagram announcement · Jul 10, 2013
  17. 17New: Share Live Video Replays to Instagram StoriesInstagram announcement · Jun 20, 2017
  18. 18@mosheh is a great news creator on Instagram, and my wife’s primary source of news these days.Adam Mosseri · Jul 27, 2021
  19. 19Introducing New Messaging Features on InstagramMeta Newsroom · Mar 31, 2022
  20. 20Memory Layer: Train the In-Model Cache for Recommendation ModelsMeta research paper · Jul 27, 2026
  21. 21Modular inbox and generation of content modulesMeta patent · Jul 30, 2019
  22. 22Social plugin reordering on applicationsMeta patent · Jun 9, 2020

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Unofficial. Not affiliated with Instagram or Meta. AI answers from the sources shown.