Pre-order in Flipkart refers to the process of booking a product before its official release or availability in the market. Customers can pre-book a product by paying a nominal amount, usually Rs. 1, to block their order. Once the product is available, customers need to confirm the order and make the balance payment through COD or any prepaid payment method (UPI/Credit Card/Debit Card/Net Banking) . Pre-ordering a product can help customers get the product at a lower price than the actual selling price. Pre-ordering is available for various products on Flipkart, including books, electronics, and other items.