All devices on the World Wide Web are recognized by a special number called an IP address, for instance 220.127.116.11. In case you have a site, the domain name that you enter to load it is for your convenience, yet the server where your site files are still has an IP. Considering that there're far more sites and devices than there're IP addresses, all shared website hosting servers have a number of sites under an identical IP, whereas with a dedicated server you will have a dedicated IP too. Even in the first case though, you will be able to obtain a dedicated IP for your sites and host them on a shared server. One benefit would be that you'll enjoy better search engine rankings because a dedicated IP usually means a quicker loading website. Also, you need such an IP when you plan to acquire an SSL certificate for your website and protect the information that visitors submit on it.