Volcanic groups refer to clusters of volcanoes that share similar characteristics, such as geological features, eruption styles, and tectonic settings. These groups can be categorized into different types, including stratovolcanoes, shield volcanoes, and cinder cones, each with distinct shapes and eruption patterns. Many volcanic groups are associated with tectonic plate boundaries, where the movement of plates creates conditions for volcanic activity. For example, the Ring of Fire in the Pacific Ocean is a prominent volcanic group known for its high concentration of active volcanoes and frequent eruptions, resulting from subduction zones and tectonic interactions.