Pointers in Go store the address of a variable in memory. A pointer variable contains the address of another variable. Functions can return multiple values using named return values. Variadic functions allow a variable number of arguments. Functions in Go are first-class and can be assigned to variables, passed as arguments, and returned from other functions. The defer statement defers the execution of a function until the surrounding function returns and ensures the deferred function is called even if the program panics.