I type C into the Omnibox and Chrome knows that I want to go to Chromestory.com, (99.99 times that is). I type Y and Chrome knows I want to open Youtube.com.

So, how does this happen?

chrome://predictors/ can give you some details. It stores the predictions that Google Chrome has made for you and some insights into the accuracy of such predictions.

There are also 3 values: hit count (how often you type those characters), miss count (how often you pick a different suggestion), and confidence score = hit_count/(hit_count+miss_count). Check “Filter zero confidences” to remove entries with a 0 confidence score. Green entries have a 1 confidence score, which means that the text is always associated with the URL.

Take a look. I am sure you will find this interesting.

via Google System.