Catholics were not the first to pray with beads. And while the exact origin of prayer beads is unknown, men and women of many faiths and cultures (Hindus, Greeks, Buddhists, and more) have (and do) use beads to pray. In fact, the word bead in English is actually derived from an Old English word bede that means prayer. The use of prayer beads almost universally is to allow the person to keep track of the number of prayers that have been said, while at the same time focusing on the deeper meaning of the prayers themselves.
The earliest form of the rosary developed when Pope Gregory the Great (590-604) popularized an earlier version of the Hail Mary prayer by asking it to be prayed on the fourth Sunday of Advent. Many individuals began praying the Hail Mary in a repetitive fashion using a string of beads to keep track of the prayers.
After the full development of the Hail Mary prayer, the term “rosary” was finally given in 1597. For 320 years, from 1597 until 1917, the form of both the Hail Mary and the rosary remained the same.
During those 320 years, there was much written and spoken about the rosary. Most notably, Pope Paul VI said when we pray the rosary we can experience the key moments of the Gospel. It is a simple, beautiful, and focused meditation, especially when focusing on the mysteries of the rosary.