RELX (formerly Reed Elsevier) is a global provider of information-based analytics and decision tools for professionals in science, legal, risk, and exhibitions, helping businesses and customers make better decisions using data and insights. They offer scientific publishing (Elsevier), legal/risk analytics (LexisNexis), and run major global exhibitions like the World Travel Market. Essentially, RELX provides critical data, analytics, and platforms to various industries to improve efficiency, reduce risk, and access knowledge.