Personal Business Cards

My husband told me once that I should start ordering some personal business cards. I said why? and is it really necessary? He said yes. But I wasn't really paying attention when he said that because I see no reasons why. But then later on I started needing it because of our small business and we all know if you are in a business, you need a detailed contact of your business to promote it. So I then told hubby thank you for consistently reminding me that I needed some.