You should ask for the report. If you inquire about the report before you hire a writer, this would greatly help you in the end. Many agencies will not provide you the report with cheap assignment writing service if you don’t get a promise from them in the very first stage.
As far as its significance is concerned, you must know that plagiarism is a punishable act in many countries. There may be huge fines and even suspension from the college so you can’t ignore it. A plagiarism report helps you improve the plagiarised parts of your assignment.