If I was moving to a certain area or a different county altogether, it would be great to get some demographic data of that county or area. But of course for a greater use of demographic datas are for marketing purpose and to consolidate all information so that a company knows which area and what kind of product or services they can offer to that particular community. With this data, you can get income, the house value, race and even marital status on any address, thus making any marketing promotion a greater success.