In Advance of RankBrain, Google didn’t comprehend synonyms and would return literal interpretations of a term. From Google: “…ahead of we had Highly developed AI, our programs only looked for matching terms. By way of example, should you searched for “pziza” – Except there was a page with that https://wiki-articles-backlinks34443.empirewiki.com/8089432/what_does_google_ranking_mean