One of Google’s main objectives is certainly its search engine, the fulcrum of the company’s activity and which is constantly monitored and improved over time.
The algorithm used by Google very often tends to provide results taken from a number of reputed sites that are reputable, but which over time may be obsolete because maybe in the meantime more information on that particular topic has been released.
The Mountain View company has therefore activated in this sense and is improving its system to distinguish the current contents from the older ones, paying attention to cataloging the oldest contents that are still valid in the result.
An example of how the algorithm is evolving is shown in the image below, in which both results are considered valid, with the second result more complete and more current:
The purpose of Google will therefore be to understand which systems, even if dated, will remain useful over time and when instead a certain information will require a more recent and therefore more complete search result.