Redshift is a fully managed, petabyte-scale data warehouse service in the cloud, offered by Amazon Web Services (AWS). It enables users to run complex queries and analytics on vast amounts of structured and semi-structured data quickly and efficiently. Redshift uses columnar storage and data compression to optimize query performance and reduce storage costs. It integrates seamlessly with other AWS services, supports standard SQL queries, and provides tools for data ingestion, transformation, and visualization. Redshift’s scalability and performance make it a popular choice for data warehousing and big data analytics.