Abstract: In some embodiments, a method can comprise analyzing user interaction with one or more items. In some embodiments, analyzing user interaction with the one or more items can comprise determining a number of impressions for each item of the one or more items. In many embodiments, the method can further comprise determining at least one undiscovered item of the one or more items based at least in part on the analyzing user interaction with the one or more items, estimating a performance of the at least one undiscovered item of the one or more items, promoting the at least one undiscovered item of the one or more items based at least in part on the estimating the performance of the at least one undiscovered item of the one or more items. Other embodiments of related methods and systems are also provided.

Abstract: In some embodiments, a method can comprise analyzing user interaction with one or more items. In some embodiments, analyzing user interaction with the one or more items can comprise determining a number of impressions for each item of the one or more items. In many embodiments, the method can further comprise determining at least one undiscovered item of the one or more items based at least in part on the analyzing user interaction with the one or more items, estimating a performance of the at least one undiscovered item of the one or more items, promoting the at least one undiscovered item of the one or more items based at least in part on the estimating the performance of the at least one undiscovered item of the one or more items. Other embodiments of related methods and systems are also provided.

Abstract: Embodiments of a data representation system for describing specific data sets, such as documents, web pages, or search engine queries, based on data tokens, such as words or n-grams, contained in a collection of documents are described. Such a system can be used in any type of information retrieval application, such as a document, web page, or online advertisement serving process, based on an information request, such as a query executed through an Internet search engine. For example, when a search is performed at a search engine, a content provider uses the system to represent the search query and compares the query representation against representations of a set of content in order to identify, retrieve and aggregate the content from the set most relevant to the search query, in the form of a web page or other data unit for display or access through the web browser.