engine - 3:35 pm on Nov 3, 2011 (gmt 0)

Google Freshness Algo Tweak [googleblog.blogspot.com]

Building upon the momentum from Caffeine, today we’re making a significant improvement to our ranking algorithm that impacts roughly 35 percent of searches and better determines when to give you more up-to-date relevant results for these varying degrees of freshness.

Recent events or hot topics. For recent events or hot topics that begin trending on the web, you want to find the latest information immediately. Regularly recurring events. Some events take place on a regularly recurring basis, such as annual conferences like [ICALP] or an event like the [presidential election]. Frequent updates. There are also searches for information that changes often, but isn’t really a hot topic or a recurring event.