On The Points Guy: What's in an Airport Code?

This month I have started collaborating with The Points Guy, one of the global websites of reference for frequent travellers and all those interested for air travel, in general.

The topic of my first article for TPG is the fascinating World of airport codes.

What is the difference between ICAO and IATA codes? What do they mean? How are they assigned? How uses them?

Check it out here!