Proven SEO Techniques 4

31. The method of claim 1, wherein the one or more types of history data includes information relating to differences in documents and anchor text associated with links to the documents; and wherein the generating a score includes: determining whether a content of the document changes such that the content differs from anchor text associated with one or more links to the document, and scoring the document based, at least in part, on whether the content of the document changes such that the content differs from the anchor text associated with one or more links to the document.

32. The method of claim 1, wherein the one or more types of history data includes information relating to freshness of anchor text; and wherein the generating a score includes: determining freshness of anchor text associated with one or more links to the document, and scoring the document based, at least in part, on the freshness of anchor text associated with one or more links to the document.

33. The method of claim 32, wherein the freshness of anchor text associated with a link to the document is based on at least one of a date of appearance of the anchor text, a date of a change to the anchor text, a date of appearance of a link associated with the anchor text, a date of a change to a link associated with the anchor text, a date of appearance of the document, and a date of a change to the document.

34. The method of claim 1, wherein the one or more types of history data includes information relating to traffic associated with documents; and wherein the generating a score includes: determining characteristics of traffic associated with the document, and scoring the document based, at least in part, on the characteristics of traffic associated with the document.

35. The method of claim 34, wherein the determining characteristics of traffic associated with the document includes analyzing a traffic pattern associated with the document to identify changes in the traffic pattern over time.

36. The method of claim 1, wherein the one or more types of history data includes information relating to user behavior associated with documents; and wherein the generating a score includes: determining user behavior associated with the document, and scoring the document based, at least in part, on the user behavior associated with the document.

37. The method of claim 36, wherein the user behavior relates to at least one of a number of times that the document is selected within a set of search results and an amount of time that one or more users spend accessing the document.

38. The method of claim 1, wherein the one or more types of history data includes domain-related information corresponding to domains associated with documents; and wherein the generating a score includes: analyzing domain-related information corresponding to a domain associated with the document over time, and scoring the document based, at least in part, on a result of the analyzing.

39. The method of claim 38, wherein the scoring the document includes: determining whether the domain associated with the document is legitimate, and scoring the document based, at least in part, on whether the domain associated with the document is legitimate.

40. The method of claim 38, wherein the domain-related information is related to at least one of an expiration date of the domain, a domain name server record associated with the domain, and a name server associated with the domain.