Abstract: The disclosure relates to the use of biomarkers for predicting the response to cancer (e.g., melanoma) treatments, for selecting a treatment for a cancer patient (e.g., using targeted therapy, e.g., using an agent targeting BRAF and/or an agent targeting MEK in combination with an immuno-oncology therapy (e.g., an anti-PD-1 therapy)), for stratifying cancer patients into different treatment groups, for treating cancer patients, and for predicting clinical outcome in cancer.