In 2017 the volume of internet advertising exceeded CZK 23 billion. Compared to 2016, this represents growth of 18 per cent caused, in absolute figures, primarily by display and search advertising. The highest relative growth was achieved by search advertising (+ 26 per cent), while classified and directories increased by 17 per cent and display advertising by 16 per cent. From the viewpoint of the manner of advertising space purchase the programmatic purchase of display advertising increased by 20 per cent, 68 per cent out of which was RTB. Expectations for the coming year are also optimistic; the survey participants assume that online advertising will continue to grow by 13 per cent up to CZK 26, 4 billion in 2018. Out of the total advertising expenditures, online advertising accounts for a 22,5 per cent share. The data come from the annual survey of Internet advertising performance conducted for SPIR by MEDIAN.