A graph database is like a map with roads, but instead of roads it has nodes and relationships. The nodes are like cities, and the relationships are like the roads that connect them. Each node has some information about it, like the population of a city or what type of businesses are in it. The relationships also have information about them, like how long it takes to travel from one city to another or what type of transportation is available. This type of database is useful for finding connections between different pieces of data, like people that go to the same store or have the same hobby.