MBTiles is a file format for storing map tiles in a single file. It is essentially a SQLite database that contains pre-rendered map tiles, which can be used for offline viewing and fast access. The format is designed to be simple and efficient, allowing for easy distribution and use of map data. MBTiles files typically contain tiles at various zoom levels, allowing users to zoom in and out of the map. The tiles are stored as images (usually PNG or JPEG) in the database, along with metadata about the map. MBTiles is commonly used in mobile applications, web mapping libraries, and desktop GIS software. It provides a convenient way to package and distribute large amounts of map data for offline use, reducing the need for constant network access. The format is open and well-documented, making it a popular choice for developers working with geospatial data.