I'm really not sure what they mean by "track something on the web". Do they mean "monitor price changes for something you might want to buy sometime with push

I'm really not sure what they mean by "track something on the web". Do they mean "monitor price changes for something you might want to buy sometime with push alerts when the price changes"? Their screen shot is a picture of an Amazon page. I can't think of anything I'd want to track that I simply wouldn't follow their twitter feed or like them on facebook. And if I was really that price sensitive, I am not sure I'd track an item on Amazon waiting for a discounted price to show up. I'm confused.