Sleep training is a process of teaching a baby to sleep through the night. There are different methods of sleep training that can be used to achieve this goal. The most popular methods include the Ferber method, the Weissbluth method, and the extinction method. The Ferber method involves gradually increasing the amount of time between check-ins. The Weissbluth method involves creating a consistent sleep schedule and following it every day. The extinction method involves letting the baby cry it out until they fall asleep. Each method has its own advantages and disadvantages, and it is important to choose the one that works best for both the baby and the parents. A good sleep training method can help to improve the quality of sleep for the entire family.