Exactly how it sounds. I hear it's very common for a toddler to understand pretty much everything but not speak much. But my 2.2 year old is the complete opposite.. he doesn't understand much at all, and can't really follow any commands but he's quite chatty. He is pretty repetitive with the words that he does say for example he will tell you the colours of absolute everything all day long. But if I was to ask him if he wants a snack or can I have a cuddle anything else there's no response.. like he doesn't understand me..