The Private Placement Memorandum serves as the primary disclosure document that describes the investment offering and the risks associated with it. It includes detailed information about the company's business, the type of securities being offered, the intended use of the funds raised, the management team, financial statements, and potential risks faced by the investors. PPMs are typically used in private placements, which are exempt from the usual registration requirements set by securities regulators, allowing companies to raise capital without going public.