The Impact of Google Scholar De-Indexing on Academic Visibility and Citation Performance: A Systematic Review

Abstract

Google Scholar has become a major platform for discovering scholarly literature, monitoring research impact, and supporting academic visibility through citation tracking. However, the de-indexing of scholarly publications from Google Scholar may reduce the discoverability of research outputs and potentially affect citation performance. This systematic review examines the impact of Google Scholar de-indexing on academic visibility and citation performance, with particular attention to the patterns, causes, and consequences of removal or loss of indexed scholarly records. The review synthesizes evidence from relevant studies and scholarly literature concerning Google Scholar indexing, academic discoverability, citation accumulation, metadata quality, technical accessibility, publisher practices, and research evaluation. The findings indicate that de-indexing can reduce the online discoverability of affected publications, interrupt citation tracking, create inconsistencies in author and institutional profiles, and limit the extent to which scholarly outputs contribute to visible citation-based indicators. The review further identifies technical problems, incomplete or inconsistent metadata, inaccessible full-text files, duplicate or malformed records, changes in publication platforms, and editorial or publishing-related issues as important factors that may contribute to indexing instability. However, the effects of de-indexing are not uniform, as citation performance is also influenced by publication quality, disciplinary practices, article age, collaboration networks, journal visibility, and availability through alternative scholarly databases and repositories. The study concludes that maintaining accurate metadata, technically accessible publications, stable web infrastructure, and consistent editorial practices is essential for sustaining Google Scholar visibility and reliable citation tracking. The review contributes to a better understanding of de-indexing as an important scholarly communication and research-impact issue and highlights the need for publishers, editors, researchers, and institutions to adopt proactive strategies for monitoring and maintaining academic discoverability.