Why did many Sophists travel throughout the Greek-speaking world?

Many Sophists traveled throughout the Greek-speaking world primarily to provide instruction in a wide range of subjects in return for fees. While they continuously traveled, they often congregated in cities like Athens, where they found the greatest demand for their services.12

This demand was driven by the nature of political life in democratic cities, where citizens from diverse backgrounds could pursue successful political careers if they could effectively persuade audiences in public forums. Consequently, the Sophists traveled to offer an education designed to facilitate success in public life, specifically providing training in rhetoric and the art of speaking. Beyond these practical skills, their curriculum often included grammar, mathematics, poetry, and the physical sciences, catering to students seeking to replace traditional attitudes with rational arguments.2