One or more text blocks, one or more images, and one or more contextual advertisements related to the text blocks are input into a mixed-content page layout model. One or more pages are generated by the mixed-content page layout model such that the text blocks, the images, and the contextual advertisements are displayed on the pages. For each contextual advertisement, a dynamic weight to a particular text block is determined. The mixed-content page layout model uses the dynamic weight for a contextual advertisement in determining where the advertisement is displayed within the pages in relation to the particular text block.