Reposts, Reshares and Sends Are the Same Signal Under Different Names
The terminology around this is genuinely confusing, and the confusion is not your fault. Instagram has never settled on one word. The button says "share". The insights panel says "shares" in some places and "sends" in others. Users say "repost". Older guides say "reshare". Search for any of these terms and you will find people describing the same action.
The action itself is one of a few things: someone adds your post to their own story, reposts it to their feed with Instagram's native repost option, or sends it to another person in a direct message. All of them take your content into a graph you do not control, and all are counted separately from likes and comments.
We list this page under reposts because that is what most people call it, but the product covers reshares and sends. If you have seen a competitor selling "Instagram sends" or "Instagram reshares" and wondered how it differs, it does not.