Hue is a web interface tool for exploring, analyzing, and visualizing data with Apache Hadoop. It allows users to prepare and browse data, compose SQL queries and search dashboards, and productionize workflows. Some key features include querying data, a light ETL tool called Livy, an indexer for full text search, and scheduling workflows. Hue aims to improve the SQL and search experience, support richer metadata search, and adopt a single page layout user interface.