Go maps are a built-in type in Go that provide a way to store and retrieve values based on keys. A map is an unordered collection of key-value pairs where each key is unique.

The syntax for declaring a map in Go is as follows:

var myMap map[keyType]valueType

Here, **keyType** is the type of the keys, and **valueType** is the type of the values. For example, the following code creates a map that maps strings to integers:

var myMap map[string]int

To initialize a map, you can use the **make()** function:

myMap := make(map[string]int)

To add values to a map, you can use the following syntax:

myMap["key1"] = 1
myMap["key2"] = 2

To retrieve a value from a map, you can use the following syntax:

value := myMap["key1"]

If the key is not present in the map, the value returned will be the zero value of the value type.

To check if a key is present in a map, you can use the following syntax:

value, ok := myMap["key1"]
if ok {
    // Key is present
} else {
    // Key is not present
}

To delete a key-value pair from a map, you can use the **delete()** function:

delete(myMap, "key1")

Maps are a powerful and efficient data structure in Go, and they are often used in place of arrays and slices for their flexibility and ease of use.