Through the collaboration between internet and conventional media, Power Keyword has become a new fashion in advertising industry last year, which appears at newspaper ads, magazine ads, TV commercials, or even outdoors. Among all mediums, TV has the strongest impact on consumers. More than 40 TV commercials inserted power keyword. Therefore, this research focuses on exploring how marketing specialists should bring the best advertising effectiveness out of power keyword. The purpose of this study is to verify the advertising impact of power keyword through keyword type and advertising type. A 2(Sales promotional advertising and non- sales promotional advertising) x 2(Power keyword Ads with large space and small space) x2(Power keyword Ads with audio and no audio) x2(Power keyword Ads with Yahoo! logo and no Yahoo! logo) between ¡Vsubject factorial design is employed in the research. Advertising communication effectiveness, on the other hand, is measured based on recall effects and search intention. An online quasi-experiment is conducted and data gathered randomly from 436 participants on their perceptions towards power keyword advertisements. Moreover, product involvement is brought into the experiment as moderating variable. The findings of the research indicate that: (1) Promotional advertising has significant influence on advertising communication effectiveness. Promotional advertising results in higher recall effects and search intention than non-promotional advertising. (2) Ads space and position has significant influence on advertising communication effectiveness. Large space of search bar results in higher recall effects and search intention than that with small one. (3) Search intention of promotional advertising does vary based on audio type of search bar on the ads. (4) Recall effect of promotional advertising does vary based on space and position of search bar on the ads. (5) Consumers with different ages, gender, and education result differently in their search intentions.