Ahead of RankBrain, Google didn’t fully grasp synonyms and would return literal interpretations of a term. From Google: “…just before we had State-of-the-art AI, our units basically looked for matching words and phrases. One example is, if you searched for “pziza” – Except there was a page with that https://searchengineoptimizationm22222.designertoblog.com/58171402/getting-the-google-ranking-to-work