How many types of shia?

There are several branches within Shia Islam, with the main ones being Twelver (Ithna Ashari), Ismaili, and Zaydi. Twelver Shia is the largest group, believing in a line of twelve imams. Ismailis split from the Twelvers over the succession of the seventh imam, while Zaydis differ in their beliefs about leadership and the imamate. Each branch has its own interpretations and practices, reflecting the diversity within Shia Islam.