A Book Building IPO allows companies to set a price band, with a lower and upper limit, for their shares (e.g., ₹100-₹120 per share), and investors can place bids within this range. Through the bidding process, investors indicate how many shares they wish to purchase and at what price within the specified range. The final price, or Cut-off Price, is determined based on the demand and bids collected over a defined period. Investors who have bid at or above this price are then allotted shares. The book-building process is more transparent than traditional fixed-price IPOs, as it provides the issuing company with real-time demand data, enabling adjustments to pricing. Both institutional and retail investors can participate, with retail investors having the option to bid at the cut-off price to receive shares at the final price set through the book-building process. This method offers benefits such as market-driven pricing, which ensures better price discovery, and reduces the risk of underpricing or overpricing shares. As a result, book building is the most common approach for IPOs in India, offering a more efficient and responsive way to price shares.