This process is a requirement by federal AML (Anti-Money Laundering) and KYC (Know-Your-Customer) regulations.
Stripe does business in 135+ countries and is required to meet each countries' compliance laws. Regardless of where you're signing up from, your government needs this information to help fight tax fraud and money laundering.
Stripe might also require some documentation from you, for verification purposes. You can check this page for more details on what exactly might be needed.
For helpful step by step instructions on how to connect a Stripe as a payment processor, please feel welcome to watch this video: