Collab post: the only way to add two audiences to the same post

In a collab post, the content appears in the grid of every account involved, with the names side by side in the header, and the metrics are a single set: the same likes, the same comments and the same aggregate reach.

Worth separating from two neighbours that cause confusion:

• Tagging someone in a photo. The post lands in the tagged account's photos-of-you tab but is not distributed to their followers.
• Reposting. It creates a new piece with separate metrics, and it runs into originality policy.

Only collaboration makes distribution add up. Which is why it is, in practice, the most legitimate growth shortcut available.

In the new post flow, on the final screen before publishing, there is a tag people option, and inside it the option to invite a collaborator. You pick the account, publish, and they receive an invitation.

Three things follow from that:

• The post only appears on the other profile after acceptance. Until then it lives only on yours.
• Whoever accepted can remove it later, and if they do the post leaves their grid and becomes yours alone.
• You can invite more than one account, depending on the format and the app version.

It is one of the most frequent searches about the feature, and the causes are usually mundane:

• Outdated app. The most common cause of all.
• Unsupported format. Not every post type accepts collaboration, and that changes over time.
• A private account on one side, which limits distribution and sometimes the feature.
• An active restriction on the account. Worth checking the account status screen.
• Already published. The invitation happens at creation; you cannot add a collaborator to an old post.

• Pick a similar audience, not a direct competitor. The gain comes from adjacent, not identical, publics.
• Agree beforehand. An unannounced invitation frequently goes unaccepted, and the post ends up lopsided.
• Mind the cover. It will sit in both profile grids and has to make sense in both contexts.
• Align the hook. The content has to serve both bases, otherwise one of them does not interact and the post performs worse than it would alone.
• Measure by non follower reach. That is where the collaboration effect actually shows.

• I agreed the collaboration before sending the invite.
• The cover works in both profile grids.
• The content interests both audiences, not just mine.
• I know a collaborator cannot be added after publishing.
• I measure the result by non follower reach.