Instagram's collaborator feature lets one account create a post or Reel and invite another to co-author it. Once accepted, the content shows on both grids with both names in the header, and all engagement is pooled rather than split — so the algorithm sees one high-performing post instead of two competing ones.
Collab posts are a go-to growth tactic for creator partnerships, brand-creator campaigns, and giveaways, because each side exposes the content to a fresh audience. They consolidate reach and engagement, which can help the post perform better than two separate cross-promotions would.
