A VCard is short for virtual card. This file will add the contact information of the creator into the recipient’s telephone contacts manager. A VCard comes in two options (QR code, or .vcf). Ideally, one my have multiple bits of information such as telephone number, contact site, and email address. In my instance, I have my name (obviously), my [Cellular] Number, and [Fax] Number. I also have my email address, .TEL address, and mailing address. The only intervention on your part will be to add, or save the contact. You do not have to put in any bits of information as this is all done with the VCard.
If you would like to create your own .vcf file, you can do so by going to https://vcardmaker.com. If you want a QR card, you can. go to https://www.qrcode-monkey.com/#vcard. Both of these links will prompt you to download either a .vcf file, or an image for the QR code.