You can’t drive people to a website, if you give them the wrong web address.
Walking through a trade show many of the tables are giving out free products ranging from pens and pencils to mousepads and keychains. The room is full of marketing products driving traffic to organizations handing out branded collateral. But what happens when the product you are handing out doesn’t have the correct contact information? What happens when you don’t catch it but a potential customer does?