Esta

: The application includes questions about criminal history and previous travel to certain countries; answering "yes" to these may require a standard visa application instead.

: You can travel to the U.S. multiple times during the validity period without needing to reapply each time. : The application includes questions about criminal history

: While you don't need to print the authorization (it is electronically linked to your passport), keeping a copy of your application number is useful for checking status or updating travel details. : The application includes questions about criminal history

: It allows citizens from eligible countries to visit the U.S. for up to 90 days without obtaining a traditional visa. : The application includes questions about criminal history