Google Trends-Google Trend in Chinese

Http://www.google.com/trends?hl=zh-cn
Today, it feels like an influential source of information.
When you enter a word, it shows the trend of how many times the term has been searched in recent years, and which cities have been searched more frequently. We can use this information to see how popular the word is on the Internet, and so we need to be able to analyze more information.
Look at the "Yuyuantan" search trend, only a region of Beijing has a search volume, it should be true. Note that Google Trends is not chiseler play.

This statistical result, based on the internet, covers more and wider areas of investigation than traditional sampling surveys, but it does not know the other characteristics of searchers, such as gender-age education. But he may be a powerful addition to the survey.

Thinking:
Why some products will be welcomed by users.
The appearance of which products will be welcomed by users.
And which products are revolutionary.