Age is one of the factors which search engines often consider while determining the credibility of an individual, document or website. Age, such as that defined for a site, page, user account or historical data may also factor into boosting the relevance of certain documents if they’re new enough. Fresh and relevant content also has the added advantage of ranking better than other content if it has been cited from multiple other sources. This leads to higher credibility since the content has been cited off a well trusted and a high Pagerank page.