A road map is a map that displays roads and transport links. Not many people still use an actual road map its self. Road maps help people get to where they need to be. Road maps provide us with information like how we can travel from one place to another, physical features, political features.
A topographic map is a map characterized by large-scale detail and quantitative representation of relief. This map shows natural and man made features.
A concept map is a diagram that depicts suggested relationships between concepts. This diagram/ map can help with things like engineering, designers, technically anything.