Cytokinins are a class of plant hormones that play a crucial role in regulating growth and development. They promote cell division, which helps plants grow taller and produce new leaves and branches. Cytokinins are primarily found in areas of active growth, such as roots and developing fruits, and they work in tandem with other hormones like auxins to ensure balanced plant development. These hormones also influence various processes, including seed germination, flowering, and leaf senescence. By delaying the aging of leaves, cytokinins help plants maintain their green color and vitality for longer periods. Overall, cytokinins are essential for healthy plant growth and productivity.