The document discusses underwriting, which refers to an agreement where underwriters guarantee to purchase any shares or securities not subscribed to by the public from a company's public offering. It provides context around why underwriting is needed when a company conducts an initial public offering to reduce uncertainty if the public does not fully subscribe to the offering. It also defines underwriters as those who guarantee subscriptions and are responsible for purchasing unsold shares, distinguishing them from brokers who do not take responsibility. The document outlines different types of underwriting agreements, underwriter roles and responsibilities, and SEBI guidelines regulating underwriters in India.