1. A computer-implemented method comprising: receiving a selection of one or more trust criteria; determining that a web site satisfies at least a portion of the one or more trust criteria; assigning, based on at least the portion of the one or more trust criteria, a credibility score to the web site, wherein the credibility score is within a predefined range of credibility scores; receiving a search input from a computer device; determining that the web site comprises information that this relevant to the search input and that the credibility score is within a confidence range of credibility scores, wherein the confidence range comprises a portion of the predefined range; wherein the confidence range comprises the credibility score with an increased value relative to other values of other credibility scores in the predefined range of the credibility scores; and sending, to the computer device, information for displaying the web site.