Google’s algorithm on search is probably guarded as well as Cokes secret formula. The highly regarded guarded algorithm is perhaps the biggest reason for Google’s search dominance. However, it appears that Google has softened up a bit, and shared a brief video on how they adjust the algorithm. Now don’t go thinking you can start your own search site from this. While it sheds light on the process, it does nothing more than offer a peak into what the Google engineers do over 500 times each year.
While an improvement to the algorithm may start with a creative idea, it always goes through a process of rigorous scientific testing.