There are various techniques parents can use to soothe a crying baby. These include:
Feeding the baby if they are hungry. Checking for a dirty diaper and changing it. Swaddling the baby to provide a sense of security. Rocking or gently bouncing the baby. Offering a pacifier. Ensuring the baby is not too hot or cold. Using white noise or calming music.
Each baby is different, so it may take some trial and error to find what works best.