The main subject of the website esta-online.org is the Electronic System for Travel Authorization (ESTA), a mandatory travel authorization for travelers to the United States under the Visa Waiver Program. The site provides comprehensive information on the application process, eligibility criteria, and associated fees. It also offers guidance on how to handle denied applications and common issues. Additionally, visitors can find information about the Visa Waiver Program countries and the importance of ESTA in ensuring secure travel to the United States.
