A shamrock is a younger clover plant with three leaves. It’s a image of Eire and is usually utilized in decorations and celebrations on St. Patrick’s Day.
The shamrock has been used as a logo of Eire for hundreds of years. It’s mentioned that Saint Patrick used the shamrock to clarify the idea of the Holy Trinity to the Irish folks. The three leaves of the shamrock symbolize the Father, the Son, and the Holy Spirit.