Anonymous structs in Go are struct literals defined without a preceding type declaration, allowing you to create a struct value directly at the point of use. You define them by listing the field names and values inside curly braces, optionally prefixed with struct{} to explicitly declare the type.
s := struct {
Name string
Age int
}{Name: "Alice", Age: 30}
// Access fields directly
fmt.Println(s.Name)
This creates a variable s of an unnamed struct type containing the specified fields.