Why? Because people need to know how you are handling their information. They need to know what information you collect about them, how you are storing it, and what you might do with it.
- Don't be dishonest about the information you collect and what you are going to do with it. Tell your visitors exactly how you are going to handle their information. If you plan to use their email to send follow-up marketing or a newsletter, tell them that. This doesn't have to be overly complicated or “legal”.
- Cookies are tasty, but they also can provide you with information about your web visitors. Your site visitors should be able to opt-out or disable cookies on your website if they want to. Make sure to include information on how they can do this.
This stuff is pretty simple and easy for you to implement in about 15 minutes.