SMEs internationalisation has been widely studied because these companies, which are very important for the economy, are now big players in international markets despite their lack of financial resources and managerial capabilities; they have been able to overcome some barriers due to new technologies. Social media are a new phenomenon which has been studied from a marketing perspective but not from an internationalisation perspective. Hence, a qualitative research consisting of interviews to Colombian SMEs in order to explore the usefulness of social media in the internationalisation process of SMEs was conducted, from the knowledge and networking perspective. Then, it was possible to get a first approach to the usefulness of social networks in processes regarding information dissemination and information acquisition about consumers and competitors, which leads to identify and generate opportunities in new markets. It was also possible to identify how SMEs take advantage of consumer’s reviews, content sharing and other communication strategies in order to build credibility before potential clients and to increase intimacy within their networks. Consequently, SMEs and policy makers should be aware of the potential social media have and then include it in their agendas.