Map vector data could be augmented by vector data and displayed with default Map style, for example, Contour Lines information. Each map style can be tuned to highlight or hide specific objects and switch between day and night mode. Vector maps support a huge range of map styles for many activities like cycling, hiking, riding by car or snowmobile, etc.
Vector maps are designed to be the default map data source for OsmAnd, so you need to download them to your device.