Challenges in online search:

User's information needs have literally exploded; they're inundated with information.
Sundar Pichai[1]
If the user's not satisfied, they're not going to come back to Google anymore; correct?
Mr. Dahlquist[5]
Today there are over 5 billion people with phones connected all over the world.
Sundar Pichai[1]
An effect on search quality is substantial when a change, whether positive or negative, would be sufficiently large.
Professor Oard[4]
The challenges of delivering localized information matter significantly.
Benedict Gomes[2]