What can I use as inputs?

Full addresses, place names (“Berlin”), airports (“JFK Airport”), postcodes, landmarks, and latitude/longitude pairs all work. The more specific the input, the more precise the result: adding a city or country to an ambiguous name is usually all it takes. Short codes are the one thing to watch: “JFK” or “90210” on their own can come back as not found, while “JFK Airport” and “90210, USA” resolve.