PitStop checked the document's output intent.
The output intent identifies what the final output destination of the document is, enabling everybody involved in the workflow to take the output intent into account. For example, a color proof may take into account the type of paper on which the document will be printed.
An output intent is required by the PDF/X specifications.Depending on the chosen option in the Preflight Profile or Action List, you will get one of the following messages: