An IP address is a unique number which identifies a website or a web server on the world-wide web, so if you have a dedicated IP, it will be employed exclusively by your Internet sites and will not be shared with other individuals as it happens with shared website hosting accounts. Provided you have your own server, you will have a dedicated IP, but you may require extra ones for many different uses. If you have an online store, for instance, you shall need an SSL certificate for it, so as to make certain that the payment info your customers submit shall be encrypted and safe. The same is valid in the event that you have a login form of some type and you wish the usernames and the passwords that visitors type in to be secured. The SSL certificate requires a dedicated IP address, which needs to be different from the one which you already have on the hosting server. You might also need an independent IP for an application such as a VoIP server, or if you desire a slightly better efficiency for a certain site, which may influence its position in search engine results.