10. One or more computer-readable media having computer-executable instructions embodied thereon for performing a method of determining search results based on a first query, the method comprising: presenting a first set of search results incident to receiving the first query, the first set of search results including a first listing of items related to the query, the first listing of items in a first order and including first descriptions, wherein the items, if acted on, present objects, which objects include one or more products or links to other items; tracking user-interaction data as a user interacts with the first set of search results, wherein the user-interaction data includes click events, hover events, query abandonment, link avoidances, and dwell time, and further wherein the user-interaction data includes metadata, which metadata includes at least one of (1) item-level metadata, or (2) object-level metadata; storing the user-interaction data in a data store; and incident to receiving another query that is the same as the first query, presenting a subsequent set of search results based on the user-interaction data, including the metadata, such that the metadata influences a ranking and a description of the subsequent set of search results, wherein influencing a ranking comprises presenting a second listing of a items in a different order from the first order, said different order based on the user-interaction data, and further wherein second descriptions are presented in connection with the second listing of items, wherein the second descriptions are different from the first descriptions, and wherein the second descriptions are based on the user-interaction data.
10. One or more computer-readable media having computer-executable instructions embodied thereon for performing a method of determining search results based on a first query, the method comprising: presenting a first set of search results incident to receiving the first query, the first set of search results including a first listing of items related to the query, the first listing of items in a first order and including first descriptions, wherein the items, if acted on, present objects, which objects include one or more products or links to other items; tracking user-interaction data as a user interacts with the first set of search results, wherein the user-interaction data includes click events, hover events, query abandonment, link avoidances, and dwell time, and further wherein the user-interaction data includes metadata, which metadata includes at least one of (1) item-level metadata, or (2) object-level metadata; storing the user-interaction data in a data store; and incident to receiving another query that is the same as the first query, presenting a subsequent set of search results based on the user-interaction data, including the metadata, such that the metadata influences a ranking and a description of the subsequent set of search results, wherein influencing a ranking comprises presenting a second listing of a items in a different order from the first order, said different order based on the user-interaction data, and further wherein second descriptions are presented in connection with the second listing of items, wherein the second descriptions are different from the first descriptions, and wherein the second descriptions are based on the user-interaction data. 11. The media of claim 10 , wherein the items include one or more of: web pages; summary results; and rankings.