This book constitutes the proceedings of the 15th PLAIS EuroSymposium on Digital Transformation, PLAIS EuroSymposium 2023, which took place in Sopot, Poland, in September 2023. The primary objective of the PLAIS EuroSymposium 2023 was to foster discussions on general issues pertaining to digital transformation and related topics. The papers selected this year are related to the use of machine learning, internet of things and social media. The 7 full papers included in this volume were carefully reviewed and selected from a total of 22 submissions.