What is the difference between "donde" and "adonde?"

Question

What is the difference between "donde" and "adonde?"

Answer 1

donde means where in general while adonde means to where.

ex: ¿Dónde está? = Where is it?

¿Adonde vas? = Where do you go?

Answer 2

Here's what the dictionary on this site says:

Donde combines with the preposition a to form adonde when following a noun, pronoun or adverb expressing location (e.g. el sitio adonde vamos the place where we're going; es allí adonde iban that's where they were going).