The Visa Waiver Program is a US government initiative that allows people of participating nations to enter the US without getting a visa for business or tourism. The benefit of entering the US with an accepted ESTA application is that you can enter the country on short notice.
However, the Visa Waiver Program does not allow everyone to enter the United States. Only citizens of visa waiver program countries, including Swiss nationals, can apply. Travelers with passports from other, non-visa-exempt countries must apply for a B-1 Business Visa or B-2 Visitor Visa, even for short visits. It’s worth noting that a travel authorization (ESTA) must be obtained in advance online, but the I-94W Form is usually completed on the plane or before entering the US port.