I have been told that my melanoma is advanced and that I am at stage 4. What does this mean

As a stage 4 melanoma patient, there is no doubt that your condition is serious.  However, there have been great strides made in the treatment of melanoma in the last few years and there are now some treatments available to advanced patients that are life prolonging treatments and showing great promise.

The Melanoma Taskforce pathway document which can be read here is a very useful tool for patients.