The invention relates to a method for implementing user-driven adaptation of a ranking of navigation elements of a client application. The navigation elements are provided for use by the client application as part of search results in reply to search queries issued by the client application. A search service executes search queries, a ranking infrastructure provides a ranking model for ranking search results as well as a ranking training component for updating the ranking model. The user-driven adaptation is received from a navigation adaptation component of the client application and used by a ranking adaptation component of the search service for updating the training data. The ranking adaptation component invokes the ranking training component to calculate an updated ranking model using the updated training data.