How did controlling the gold salt trade make songhai the largest empire in west Africa?

Controlling the gold and salt trade allowed the Songhai Empire to amass significant wealth and resources, which were crucial for expanding its territory and influence. By dominating trade routes, Songhai established economic power that facilitated military conquests and the integration of various regions. This wealth also enabled the empire to invest in infrastructure and governance, further solidifying its status as the largest empire in West Africa. The strategic control of these valuable resources attracted traders and boosted cultural exchanges, enhancing Songhai's prominence in the region.