Selecting content based on user actions and preferences associates with a same time period in a previous year

摘要

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for long-term targeting. In one aspect, a method includes: assigning a user a unique identifier and recognizing the user when the user interacts with a content system; logging user actions and preferences as the user interacts with one or more web based resources over a long time period where the long time period exceeds a life of one session and an expiration of one or more cookies residing on a user device; identifying logged user actions and preferences that are associated with a same time period in a previous year, including identifying immutable and mutable aspects of the logged user actions and preferences that are time-related; adjusting the mutable aspects based on the current date; and providing, to the user, content based on the immutable aspect, the adjusted mutable aspects, and information included in a content request.