All devices on the World Wide Web are identified by a unique number called an IP address, for instance 220.127.116.11. When you have a website, the domain that you enter to access it is to save you time, however the server where the website files are still has an IP. Due to the fact that there are many more websites and devices than there're IPs, all of the shared hosting servers have a number of websites under an identical IP, while when you use a dedicated server you will have a dedicated IP as well. Even in the first case though, you'll be able to acquire a dedicated IP for your sites and host them on a shared server. One benefit would be that you may enjoy far better search engine rankings since a dedicated IP usually means a quicker loading website. What's more, you need such an IP in case you plan to purchase an SSL certificate for your site and shield the data that visitors submit on it.