“…Search engine advertising campaigns can measure the effectiveness at multiple levels: impressions, clicks and therefrom CTRs. Some researchers also suggest adding conversion potential as a metric of performance (Jansen and Clarke, 2017) Researchers have tested the effectiveness of sidedness and conclusiveness, separately, at the levels of the attitude toward the advertisement (Crowley and Hoyer, 1994;Eisend, 2006;Kardes, 1988;O'Keefe, 2016;Pechmann, 1992) or the knowledge (Ketelaar et al, 2012;Martin et al, 2003), attitude (Ahearne et al, 2000;Crowley and Hoyer, 1994;Pechmann, 1992;Skard and Thorbjornsen, 2017) or behavioral intention regarding the brand (Martin and Strong, 2016;Yao et al, 2018). Measurements in traditional studies, however, are mostly consumer self-reports with well-known drawbacks (errors from subjects' social bias, inability to remember, etc.…”