On the Instagram platform, “rb” is a common abbreviation for “repost.” It’s generally used in comments or captions to indicate that a user is sharing content that was originally posted by someone else. For example, a user might comment “rb” on a photo they plan to share to their own story, signifying they are reposting the image.
Reposting is a vital function for content amplification and user engagement within the Instagram ecosystem. It allows users to share content they find interesting or relevant with their own followers, thereby expanding the reach of the original post and the original creator. The practice has evolved organically as a way to highlight content without the need for complex or official features.