Amazon Redshift is a fully managed data warehouse service provided by Amazon Web Services (AWS). It allows businesses to store and analyze large volumes of data quickly and efficiently. Redshift uses a columnar storage format and parallel processing to deliver fast query performance, making it suitable for big data analytics. Users can easily scale their data warehouse by adding or removing nodes, which helps manage costs and performance. Redshift integrates seamlessly with various AWS services and third-party tools, enabling users to visualize and gain insights from their data through business intelligence applications.