You published an article, and now you promote it on multiple platforms (email, Facebook, LinkedIn, Twitter, etc.) It might take many touches with your reader to get them to read it, but you might be overdoing it at the same time.
Make sure you use a different image with each communication/ touch point. If you don’t, you run the risk of the reader thinking they already read your article, just because they saw the same image so many times. This is especially true if you publish frequently.