Trillions of Questions, How Google Search works

19:28 "We change our search algorithm six times a day [by doing] 200,000 - 300,000 experiments a year." 

https://youtu.be/tFq6Q_muwG0

An enjoyable, intriguing, deep look into how Google improves search capabilities. 

...And here is how Google presents all the above to the public in an easily digestible summary: