Google’s Caffeine web indexing system which was developed last year allows the search engine to provide the most recent information relevant to the user’s search.
Now Google has introduced major changes to the ranking of its freshness algorithm, allowing the search engine to better decide how recent, or ‘fresh’, the results of a search should be.
For example, searches on recent or regularly occurring events will provide the most recent information, hours or even minutes old, according to the user demands of the latest information on the relevant topic. The same goes for frequently updated information, not classed as a ‘hot topic’, i.e. the best android phones.
However, up to date information may not be needed in every case and so searches for things such as recipes will show useful information that may be months or years older. The improvements to Google’s core will interpret the needs of different searches and their ‘freshness’ requirements, making its results even more specialised.
Google predicts that this will have an effect on around 35% of searches, and that these new changes will help them keep up with the rate at which information moves and is available today.
Source: The Official Google Blog