Imagine that a number of people use Google to perform a search for “orange,” and then “banana,” and then “pineapple” and then choose the web page “http://www.example.com/fruit.htm” in the search results they see.
Now imagine that Google looks at the information it collects about what people do when they search, and finds 点击和查询日志模式 showing that there are a large number, a statistically significant number, of people who search for “orange,” and then “banana,” and then “pineapple,” or possibly the same search terms in a slightly different order, and they tend to click on “http://www.example.com/fruit.htm.”
Google may also notice that there are people looking for some very 有关 terms during query sessions such as consecutive searches for “banana,” “apple” and “pineapple.”
Since this second set of queries for “banana,” “apple” and “pineapple,” is so similar to the query sessions that contained the search terms “orange” and “banana” and “pineapple,” where people were choosing the page “http://www.example.com/fruit.htm,” Google may choose to adjust the ranking for “http://www.example.com/fruit.htm,” for people using those very 有关 terms in their search sessions.
由Mayur Datar，Kedar Dhamdhere和Ashutosh Garg发明