1. A computer-implemented method comprising: detecting an occurrence of a pre-search trigger, the pre-search trigger corresponding to a user action to gain access to a search interface at a particular time; identifying a user associated with the pre-search trigger; identifying a topic classified as a likely topic of interest for the identified user based on a browsing history of the identified user or a search query history of the identified user; in response to detecting the occurrence of the pre-search trigger, determining a confidence score associated with the topic based on the particular time of the user action, the confidence score indicating a likelihood that the topic is of interest to the identified user at the particular time determining that the confidence score associated with the topic satisfies a predetermined threshold value; instructing a search engine to execute a search using a search query associated with the particular topic in response to determining that the confidence score associated with the particular topic satisfies the predetermined threshold value; and providing a representation of a resource identified in results received in response to the search.