Before RankBrain, Google didn’t understand synonyms and would return literal interpretations of a term. From Google: “…ahead of we had Highly developed AI, our systems simply searched for matching terms. One example is, in case you searched for “pziza” – Until there was a page with that particular misspelling, https://trentonzfknr.homewikia.com/10627768/8_simple_techniques_for_google_ranking_test