Big data analytics involves collecting and analyzing large amounts of structured and unstructured data to discover useful patterns and business insights. It helps organizations determine relevant data to make better strategic decisions and remain competitive. Industries like travel, healthcare, ecommerce, retail, and manufacturing all generate huge amounts of data that can be analyzed through big data. Text analytics is the process of analyzing unstructured text data to extract meaningful information through techniques like lexical analysis and entity modeling to support fact-based decision making. It can analyze various file formats and languages from different data sources.