In an era where online social platforms, big data, and AI are reshaping our world, the Linking Surveys and Social Media Data: Advancing Public Opinion Research (LASER) Workshop stands at the forefront of revolutionizing public opinion research. Addressing the challenges and opportunities at the intersection of traditional surveys and social media data, this workshop is a pivotal platform for scholars to explore innovative approaches in Computational Social Science (CSS). As a collaboration of the ERC-funded Politus Project and CSS Research Center of Koç University (ccss@ku.edu.tr), we organize this workshop and invite researchers to submit an abstract (max. 1000 words) showcasing their work in the dynamic field of survey and social media data linkage. Abstracts should reflect a profound integration of these methodologies and contribute significantly to the field of CSS and public opinion research.