21. A system comprising: a computing device; and a non-transitory computer-readable medium coupled to the computing device and having instructions stored thereon which, when executed by the computing device, cause the computing device to perform operations comprising: receiving trigger query data, the trigger query data identifying one or more trigger queries and one or more sets of authoritative users, each set of authoritative users being associated with a respective trigger query; generating a plurality of trigger query and authoritative user pairs, each trigger query and authoritative user pair identifying a trigger query and an authoritative user from a set of authoritative users associated with the trigger query; for at least one trigger query and authoritative user pair: generating a snippet based on user data, the user data being associated with the authoritative user in one or more computer-implemented services, the snippet being specific to the trigger query and specific to the authoritative user, and determining that the snippet is insufficient, and in response, modifying the snippet to provide a revised snippet; and storing one or more snippets including the revised snippet in computer-readable memory, each snippet being specific to a respective trigger query and authoritative user pair, for which the respective snippet was generated.
21. A system comprising: a computing device; and a non-transitory computer-readable medium coupled to the computing device and having instructions stored thereon which, when executed by the computing device, cause the computing device to perform operations comprising: receiving trigger query data, the trigger query data identifying one or more trigger queries and one or more sets of authoritative users, each set of authoritative users being associated with a respective trigger query; generating a plurality of trigger query and authoritative user pairs, each trigger query and authoritative user pair identifying a trigger query and an authoritative user from a set of authoritative users associated with the trigger query; for at least one trigger query and authoritative user pair: generating a snippet based on user data, the user data being associated with the authoritative user in one or more computer-implemented services, the snippet being specific to the trigger query and specific to the authoritative user, and determining that the snippet is insufficient, and in response, modifying the snippet to provide a revised snippet; and storing one or more snippets including the revised snippet in computer-readable memory, each snippet being specific to a respective trigger query and authoritative user pair, for which the respective snippet was generated. 27. The system of claim 21 , wherein modifying the snippet to provide a revised snippet comprises identifying another snippet associated with the authoritative user to be used as the revised snippet.