machine learning - Difference between a search engine's relevance rankings and a recommender system -


what's difference between search engine's relevance rankings , recommender system?

don't both try , achieve same purpose, i.e. finding relevant items user?

there major difference between search engine , recommender system :

1 / in search engine, user knows looking for, , makes query ! instance, might wonder if should go see movie, , search informations it, actors , directors.

2/ in recommender system, user isn't supposed know recommending her. match tastes neighbours or wathever algorithm youme like, , find things would't have looked after, new movie !

one more information retrieval, while other more information filtering , discovery.


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