IPO basics

How does IPO allotment work? How does the IPO process work, from DRHP to listing? How is an SME IPO different from a mainboard IPO? What are the retail, HNI and QIB categories in an IPO? What are the price band and book building in an IPO? What are the risks of investing in an IPO? What is the difference between a fresh issue and an Offer for Sale (OFS)? What is an IPO, and why do companies launch one? What is ASBA, and why is my IPO money blocked instead of debited? What is grey market premium (GMP), and should I rely on it? What is the difference between an IPO and an FPO? Who are anchor investors in an IPO?