IndiHome is a product that is engaged in home internet service providers. The emergence of intense competition among similar service provider products makes IndiHome must have a strategy to compete. One of the strategies used is to utilize marketing through social media to grow WOM communication and as an advertising platform to grow brand awareness and create buying interest in the community.The purpose of this study was to examine the relationship between social media marketing,WOM and advertising on brand awareness and buying interest.Data collection from this study was carried out by distributing questionnaires to 394 respondents who were people from all over Indonesia who did not use IndiHome as a home internet service provider. The method used is non-probability sampling with purposive sampling technique. The data analyzed using SPSS version 25. Based on the results of hypothesis testing, the results obtained that simultaneously or partially each independent variable has a significant effect on the dependent variable. In addition, the results of the Sobel test also stated that the brand awareness variable succeeded in mediating the relationship between the independent variable and the dependent variable. The results of the study revealed that word of mouth did not significantly affect buying interest.