IP address is basic information about internet users. Every user entering gates of internet has associated his own IP address. Usually, IP address of users change in time, as your internet service provider associate a dynamic IP address, when you start using internet. In most cases, there may be thousands of people, sharing the same IP address at the same time as well. This is caused by technology called NAT, which is able to provide single IP address to many users, while keeping fluent communication with every of these users with services they actually use. Static IP address Some users may require to use static IP address - in another words, you have associated one IP address just for your purposes. Typical use case of not-changing IP address are internet services, where static address is crucial in order to work. However, there are cases when even typical internet user may require own, static IP address. Typical use case may be access to their home network. For example, by using static address, they may access their security system, a home web cam, or wake up their computer (when their home router is configured properly).