The phrase "and suddenly" is used to indicate a sudden change or event that occurs unexpectedly. It is often used in literature to create a dramatic effect or to convey surprise, shock, or excitement. The phrase can be used to describe a shift in the narrative or plot, such as a character experiencing an epiphany or realizing something significant. It can also be used to indicate a change in the environment or circumstances, such as a sudden storm or unexpected turn of events. Overall, the phrase "and suddenly" is used to convey a sense of surprise or unexpectedness.