An IP address is a unique number which distinguishes an Internet site or a server on the world-wide web, so if you have a dedicated IP, it shall be employed just by your Internet sites and won't be shared with others as it happens with shared website hosting accounts. In case you have your own web server, you shall have a dedicated IP, but you may require additional ones for a variety of uses. If you have an Internet store, for example, you will need an SSL certificate for it, in order to make sure that the payment information that your clients submit shall be encrypted and protected. The same is valid in the event that you have a login form of some kind and you would like the usernames and the passwords that visitors type in to be protected. The SSL certificate requires a dedicated IP address, which needs to be different from the one that you already have on the web server. You might also need an independent IP for an app such as a VoIP server, or if you desire a slightly better efficiency for a particular website, which will influence its position in search engine results.