All devices on the Internet are recognized by a specific number called an IP address, for instance 220.127.116.11. In case you have a site, the domain that you enter to open it is to save you time, yet the server where the website files are still has an IP. Due to the fact that there are many more sites and devices than there're IP addresses, all of the shared website hosting servers have a number of websites under the very same IP, while when you use a dedicated server you'll have a dedicated IP as well. Even in the first case though, you will be able to acquire a dedicated IP for your websites and host them on a shared server. An advantage would be that you may get far better search engine rankings since a dedicated IP generally means a faster loading website. What is more, you need such an IP in case you want to purchase an SSL certificate for your site and protect the data that visitors submit on it.