Who needs a dedicated IP address?
Generally, having a website on a shared IP address will not cause you any harm. However, there are a few cases when a static IP is required...
Having your own Private SSL Certificate. Secure e-commerce websites need SSL certificates for accepting credit cards online. Web hosts usually offer a shared SSL certificate where clients can share the Web host's SSL. If you are using your Web hosting provider's shared SSL you don't need a static IP.
Anonymous FTP. It means that anyone using the FTP software can access files in a special directory of your site. It's called Anonymous FTP because…