This study aims to analyze the effect of information service quality on the Public Engagement Index (Social Engagement Index/SEI) of local government Instagram accounts in the East Priangan region of West Java. The study employed a quantitative explanatory approach with a regional aggregate unit of analysis. Data on service quality were collected through a questionnaire administered to 150 respondents selected using a stratified random sampling technique, while SEI data were obtained through social media data extraction from local government Instagram account activities. The analysis was conducted using robust Theil Sen regression and complemented by Kendall’s tau correlation test. The results indicate that information service quality has a positive and significant effect on the public engagement index. Regions with higher service quality tend to exhibit higher SEI values. These findings confirm that improving the quality of information services is a crucial strategy for enhancing the effectiveness of local government public communication through social media.
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