1. A method of displaying by a client application running on at least one digital electronic device in communication with a search engine a plurality of user-selectable refinements to a first search query including at least one first search term, the method comprising: (a) sending by the client application to the search engine the first search query; (b) receiving by the client application from the search engine first search results in respect of the first search query and first suggested search query refinements having been determined by the search engine based at least in part on an analysis of groups of related search queries being related to the first search query, each of the first suggested search query refinements corresponding to a refined search query including the at least one first search term and at least one additional search term; (c) displaying by the client application at least one first search result and, apart from a search bar, the first suggested search query refinements, the first suggested search query refinements being selectable by a user via at least one first graphical object; (d) receiving by the client application from a user via the at least one first graphical object a first selection of one of the first suggested search query refinements, the first selection corresponding to a first refined search query including the at least one first search term and at least one first additional search term; (e) receiving by the client application from the search engine first refined search results in respect of the first refined search query; and (f) displaying by the client application at least one first refined search result and a visual representation of a refinement relationship between the first search query and the first refined search query.