18. The system of claim 16 , the operations further comprising: identifying an expert as a personalized expert for the user based on the expert's reviews of businesses and the user's reviews of businesses.
18. The system of claim 16 , the operations further comprising: identifying an expert as a personalized expert for the user based on the expert's reviews of businesses and the user's reviews of businesses. 19. The system of claim 18 , wherein identifying the expert as a personalized expert further comprises: identifying a number of businesses reviewed by both the user and the expert; and identifying the expert as the personalized expert in response to determining that an agreement score based on differences between reviews of the same businesses by the user and the expert is below a threshold.