NHS Wales Informatics Service (NWIS) provides some of the IT services within NHS Wales including our website. IP addresses are used by your computer every time you are connected to the Internet. Your IP address is a number that is used by computers on the network to identify your computer. IP addresses are automatically collected by NWIS so that data (such as the web pages you request) can be sent to you. NWIS will collect other anonymised statistical information about use of the website so that the service can be maintained and improved.