What is the relationship between Google and Amazon ?

There can be three relations between them :
- Friends
- Enemies
- Frenemies

It is a very interesting thing that what is the relationship between Google and Amazon. Amazon plans to take a google online ad business. An another survey says that Amazon spent $157.7 million on Google U.S. search ads in 2013, topping the Ad Age's list of Google's 25 largest U.S. search advertisers. In comparison, other retailers like Walmart and Sears spent $59.7 million and $59.2 million, respectively.
here is an another report by a survey company AdGooroo, which will show the comparison between product listing ad (PLA) spend and text ad spend for the percentage of budget for the top 20 advertisers.

Now- a- days, Amazon shows many types of ads on its pages, with text-based keywords ads placed by Google and other third parties. but not purchase google's product ads.
While Amazon is spending big on Google's search ads, the online retailer is reportedly developing its own ad program called Amazon Sponsored Links to compete with Google AdWords.
Looking forward, while Amazon and Google remain friends, or become enemies?
If we will see in the sense of searching the product they both are rivals to each other. here i also want to say thanks to Yuyu Chen for her post on Searchenginewatch.com. to read her full post visit at : http://bit.ly/1qOiZNt