An examine is the probability that a user consciously considers a displayed search result. Unlike an impression, which only records rendering, an examine models whether the user noticed the result. This distinction helps click models separate relevance from position bias: an unexamined result should not be penalized for receiving no click. section 11.2.3
The dryer query
For a session whose last click is at rank 9, results through rank 9 count as examined, while ranks 10 and 11 do not. A document with 355 clicks among 2,707 examines receives a grade of about 0.131.
