Every device on the internet has an IP (Internet Protocol) address assigned to it. This is used like a telephone number for yourcomputer, it allows other devices on the internet to contact it and send data.
Broadband services will normally assign a dynamic IP address when you connect – this means that your IP address will change from time to time and may also be used by others. A static IP address is reserved for you and will always remain the same. This can improve security by allowing you to lock down access to your cloud services and enables you to run services such as a VPN or email server in your office.