When I give data like Email, documents or my search history to Google I trust that they will
- keep my data secure (from hackers, employees, foreign governments, etc.)
- keep it private
- only use it for its intended purpose
- make backups.
Also, since I am an EU citizen, will my data stay within the EU?
To summarize from the answers:
- there is no outside verification, the checks are done by Google internally
- data can be stored anywhere, not just in the country of the customer