A method for generating a matrix of graphical content items to be displayed on at least one client computing device having a display is described. The method is implemented by a server computing device communicatively coupled to a database and to the at least one client computing device. The method includes retrieving, from the database, a plurality of textual content items, a link to a landing page associated with each textual content item, and an image associated with at least a part of the landing page. The method also includes generating a matrix including a plurality of portions, including, for each portion of the matrix, selecting one of the plurality of textual content items, and including, in the portion, text from the selected textual content item, the image associated with the landing page, and the link to the landing page, and transmitting data for display of the matrix to the client computing device.