14. The computer-implemented method of claim 6 , further comprising: determining at least one application, among the candidate applications, that is not installed on the device associated with the user; and removing the at least one application that is determined to not be installed on the device associated with the user from the identified candidate applications.
6. A computer-implemented method comprising: receiving audio data corresponding to an utterance of a user; determining that at least a portion of the audio data corresponds to an action keyword, the action keyword corresponding to an action to be performed by a device associated with the user; identifying candidate applications that correspond to the action keyword, the candidate applications that correspond to the action keyword comprising applications associated with a uniform resource identifier (URI) that corresponds to the action keyword; selecting a candidate application, from the identified candidate applications that correspond to the action keyword, based at least on: (i) a bidding weight associated with the action keyword for each of the candidate applications, and (ii) a power score associated with each of the candidate applications that is determined based at least on a popularity metric and a rating associated with each of the candidate applications, wherein selecting the candidate application, from the identified candidate applications that correspond to the action keyword, comprises: determining a ranking score for each of the candidate applications, the ranking score being determined based at least on the bidding weight associated with the action keyword for each of the candidate applications, the power score associated with each of the candidate applications, and a feedback score for each URI that corresponds to the action keyword, the feedback score being determined for each URI based at least on a user action associated with the URI; identifying a highest ranked application among the candidate applications that has a URI that corresponds to at least the action keyword; and executing the URI for the highest ranked application.