A new guide to Google’s ranking systems will keep you informed about which systems Google uses to rank search results and which ones are retired.
Additionally, Google introduces new terminology in its latest guide, distinguishing between ranking “systems” and ranking “updates.”
A system, such as RankBrain, is constantly running in the background. An update, on the other hand, refers to a one-time change to ranking systems.
For example, the helpful content system is always running…
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