TripAdvisor is stepping into the personalized fray with a product called "Just For You," which delivers user-targeted hotel recommendations based on user inputs and historical behavior. The official line is "based on their individual preferences and travel research on the site."
The feature also includes the ability to add tags, which gives the user control over how the personalization is tailored to a specific search. Upon inputting a search, users will be prompted to select from a variety of tags – travel style, location, price range, hotel class, amenities and brand.
This user participation is important, as it reduces the creep factor and makes the implied data usage more palatable as it can be customized per search.