In Vedic astrology, "dasha" refers to a system that predicts the timing of events in a person's life based on the positions of celestial bodies. The most commonly used dasha system is the Vimshottari Dasha, which divides a person's life into periods ruled by different planets. Each planet's influence varies in duration and significance, affecting various aspects of life such as career, relationships, and health. The dasha system helps astrologers interpret how planetary positions can influence an individual's experiences over time. By analyzing the current dasha and its sub-periods, astrologers can provide insights into upcoming challenges and opportunities, guiding individuals in making informed decisions.