Purpose – The rapid development of social economy, technology and information has changed aspects of business behavior and the economy of a country, especially in the era of globalization, free trade has led to the freedom and freedom of traffic of goods, services and information between countries. The state of increasingly advanced technology today must be balanced with the level of knowledge. This study aims to examine the effect of the knowledge level of MSME actors on the use of digitalization in the marketing sector by using socialization and interaction indicators. Design/methodology/approach – The object of research is SMEs in the city of Sidoarjo. The data collection method used a questionnaire by spreading 100 questionnaires. The data was processed using the Partial Least Square (PLS). Findings – The results showed that socialization and interaction affected the level of knowledge of MSME actors in the field of marketing digitalization, while the level of knowledge possessed by MSME actors affected the use of digitalization in the marketing sector. Originality/value – This research adds insight into efforts to increase profits for MSME growth in Indonesia.