What is meant by business investigations?

What is meant by business investigations?
Can anybody give me some information about business investigations? I have to write an essay on it.

Business investigations means to investigate corporate operations, e.g. to finding whether a business partner is lawful, whether a prospective merger is good, or whether fraud or misappropriation is going on in the company. Business investigations give you the tools and information you need to make sure that your company is successful. Good number big corporations either have investigators on retainer or have internal business investigators on hand to get them the information they need to succeed. A private investigator can review your case individually and make recommendations. Plus, qualified business investigators have understanding of business laws that lets them legally collect facts so that it is acceptable in the court of law.