In the contemporary research ecosystem, reliable citation databases are essential for identifying credible scholarly literature and assessing research impact. Web of Science (WoS), managed by Clarivate, is one of the most recognized multidisciplinary citation databases used globally for research discovery and evaluation. Known for its rigorous journal selection criteria and structured citation indexing, WoS enables researchers to track citation patterns, evaluate scholarly influence, and identify high-quality journals for publication. Its Core Collection includes major indexes such as the Science Citation Index Expanded, Social Sciences Citation Index, and Arts & Humanities Citation Index. The database also supports widely used research metrics, including the Impact Factor and h-index, which play a crucial role in academic promotions, funding decisions, and institutional ranking. This article examines the historical development, structure, citation metrics, advantages, limitations, and broader significance of Web of Science in strengthening research integrity and scholarly communication.