The 19th International Conference on Web Information Systems and Technologies (WEBIST) is a platform for the exchange of insights and strategies for leveraging web-based information systems and technologies to address business challenges effectively. The conference is structured around four primary tracks, each delving into distinct facets of Web Information Systems: Internet Technology, Web Intelligence and Semantic Web, Social Network Analytics, and HCI in Mobile Systems and Web Interfaces. WEBIST places a firm emphasis on real-world applications, encouraging authors to illustrate the tangible advantages that Web Information Systems and Technologies offer in academic, industrial, and service sectors.