During the last 10 years, CSR has gained importance worldwide due to its, presumably, positive impact on consumer behavior. However, some authors indicate that CSR does not affect consumer behavior; some of them, even indicate that, in countries with emerging economies such as Colombia, such impact is negative. CSR has been normally contextualized in large companies or multinationals but its relevance seems to be lower in small and medium-sized companies. Consequently, CSR is not as often considered a competitive tool, in markets where value propositions are becoming less and less differentiated. In Colombia, the application of marketing strategies in digital media has gained great strength. Consequently, this work aims to evaluate the relationship between CSR content and search engine advertising effectiveness. Based on a literature review on CSR research from the last 20 years, where it is evident how CSR can be used as a competitiveness tool, an online field experiment was conducted on Google AdWords. During the study, two advertising campaigns, one with CSR content and another with (Corporate Abilities) CA content, were run in the cities of Medellin and Cali respectively. The campaigns were implemented for a Colombian company that produces and commercializes plastic products. In addition, advertising effectiveness indicators such as CTR, search top impressions rate and search absolute top impressions rate, were used in order to show the relationship between CSR content on those KPIs. Through Bayesian neural networks and cluster analysis, it was possible to establish a statistical relationship between CSR content in search engines and advertising effectiveness. Such result resonates with previous studies that propose CSR as a competitiveness tool. The outcomes, thus, suggest that RSE content affects positively the KPI of Google AdWords campaigns in a Colombian company.