The interview is a crucial part of your application. You can find all the relevant information about the date and the location, and further instructions, in your Entrant Status Check.
Before you attend your interview, you must schedule an appointment with a medical professional. Your relatives included in your application are required to complete a medical examination as well.
Prior to your interview, you must also pay your application fee of $330 per person. This is non-refundable, and the payment procedure may vary between different U.S. consulates.
Do not forget to bring two photos and your passport to the interview. You also need to gather other documents, such as proof of qualifying education or work experience, and your immigration status.
If your family members are applying with you, you must also include your marriage certificate and other evidence of your kinship.