Why was the city of Meroe important to the kushites

Meroe was a wealthy metropolis of the ancient kingdom of Kush in what is today the Republic of Sudan. The city was located at the crossroads of major trade routes and it flourished from 800 BCE to 350 CE. As no one yet has been able to decipher the Meroitic script, very little can be said for certain on how Meroe grew to become the wonderous city written about by Herodotus in circa 430 BCE, but it is known that the city was so famous for its wealth in ancient times that the Persian King Cambyses mounted an expedition to capture it