Here's why:

* Shape: Shield volcanoes are characterized by their broad, gently sloping shape, resembling a warrior's shield. Kilauea's large, low-lying profile fits this description perfectly.

* Eruptions: Shield volcanoes are known for their effusive eruptions, meaning they produce large volumes of fluid, basaltic lava that flows far and wide. Kilauea's eruptions are primarily effusive, with its lava flows often extending for miles.

* Composition: The lava produced by shield volcanoes is typically basaltic, which is very fluid due to its low silica content. Kilauea's lava is also basaltic, contributing to its characteristic effusive eruptions.

While Kilauea is a shield volcano, it's also considered a basaltic volcano and a hotspot volcano. This classification acknowledges the specific type of lava and the geological processes involved in its formation.