10. The method of claim 1 , further comprising responding, by the server device, to a subsequent search query based at least in part on the ranking of the popularity of the first document.
10. The method of claim 1 , further comprising responding, by the server device, to a subsequent search query based at least in part on the ranking of the popularity of the first document. 11. The method of claim 10 , wherein responding to the subsequent search query comprises adjusting a ranking of documents in the response to the subsequent search query based at least in part on the ranking of the popularity of the first document.