A private limited company is a type of business entity that limits owner liability, restricts public trading of shares, and limits the number of shareholders to 200. It has a minimum authorized share capital of Rs. 1 Lakh. The key advantages include minimizing risk to personal assets, reducing tax burden, enhancing reputation, and allowing for higher scope of expansion. Forming a private limited company requires minimum two promoters, two directors, authorized capital of Rs. 1 Lakh, DINs for directors, DSCs for directors, name approval, drafting MOA and AOA, and filing various forms like INC-7, INC-22, and DIR-12 along with documents.