This means that your product was automatically flagged because it has a high probability to be breaking one of the marketplace guidelines.
To prevent your product from getting banned the system flags it. You can remove the hidden status from the creator dashboard, but you should make sure to read all the guidelines and verify that it is not breaking any rules first.
You do not need to contact support to remove this product status. If your products are being flagged incorrectly multiple times, please let us know via our Canny, so we can continue to improve this system.