Perfect Search implementation needs to consider many challenges here's a list of the current day technical challenges: A very basic search implementation would be searching the documents by using simple text matching this works fine however such an implementation can be used only when you have really accurate details of what to search any change in the wording, tenses or phrases will give you uncertain results. Search engines must be capable of constantly learning from users behavior and constantly improving search engine results. For example, on a search query you got a list of results and most of the users are ignoring the top ones and going for 3rd or 4th one you must provide those results first next time. Map similar queries and provide appropriate search results. Consider a search for "Elasticsearch Getting Started" & "Introduction Elasticsearch" & "Elasticsearch tutorial", the expected results are almost same for each query an effi...
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