How and when is a business card used?

Answer 1

Business cards are tools that you can use to exchange information, whether about yourself or a business. These are also used for marketing purposes - where companies create impressive cards with design similar to all their promotional materials. This will help your business be in the forefront of your target audience's minds. This is a strategy for brand recall.

You can use business cards by giving out a copy to anyone you meet for the first time; a customer visiting your office or store, a possible business associate, or a friend or relative who can pass your card along to others who might use it. During events like exhibits and trade shows, you can hand out your cards to people. You can also include it in your mailers or presentation kits.

Source: http://www.digitalroom.com/business-cards-printing.html