How do one know when to move the beads in their hand on the rosary?

On a rosary, beads are moved to aid in prayer and meditation. Typically, each bead represents a prayer; for instance, one moves to the next bead after completing a Hail Mary or Our Father. The structure of the rosary, with its distinct beads for different prayers, guides the user, allowing them to keep track of their progress through the set prayers and mysteries. As one becomes more familiar with the rosary, the rhythm of moving the beads becomes more intuitive.