Google Fusion Tables is a simple tool for managing, merging, visualizing and sharing data in the cloud. It allows users to import private or public data tables from various sources and visualize the data in tables, maps or charts. Some key features include data geocoding, merging, filtering, experimenting with different visualizations and an API. The tool aims to provide easy and collaborative data management capabilities for a broad audience. It has become commonly used in journalism by organizations like the Washington Post.