What is the zero value of a map in Go?

The zero value of a map in Go is an empty map, denoted by {}. This means that if you declare a map variable without initializing it, it will have this empty map as its value. The map will have a zero length and no elements. It's important to note that accessing keys or attempting to range over an uninitialized map will result in a runtime panic. Therefore, it's good practice to always initialize maps before using them to avoid such errors. Understanding the zero value of a map is crucial when working with Go's map data structure.