WHAT IS ESTA ?
The ESTA or electronic system for travel authorization is a system that determines whether or not one can travel to US this is provided for by the Visa Waiver Program it permits citizens of more than thirty-eight countries that include: Europe, Brazil, Chile, Australia, Finland, Hungary, Estonia among other countries.
Any international travellers who would like to travel to the United States using the VWP are required to apply for the ESTA. They must be from a country that is eligible for the VWP, they must be travelling to the United States for a period less than three months.
They must not be in possession of a visitor’s visa to the US, you must be visiting the US for tourism travel or business travel, you must be applying for a new form or be making the application online for one or more people or a group of people.