Visa B1/B2 is required for the citizens of countries who are not eligible for visa waiver to the US.

Please check the US State Department website and choose the city where you will be applying for the visa from: https://travel.state.gov/content/travel/en/us-visas.html

Citizens from the countries who participate at the Visa Waiver Program (VWP) must have a valid Electronic System for Travel Authorization (ESTA) approval prior to travel.

VWP: https://travel.state.gov/content/travel/en/us-visas/tourism-visit/visa-waiver-program.html

ESTA: https://www.dhs.gov/electronic-system-travel-authorization-esta