1. A computer-implemented method of identifying user interests, using a computer processor, comprising: receiving text from a shared topic feed distributed to the computer processor, the shared topic feed comprising at least one query received in a public stream and an actuatable link associated with the query; receiving an indication that the user has interacted with a portion of the received text; identifying content words in the portion of the received text; identifying the user interests based on the content words identified; and displaying an indication to the user indicative of the identified user interests.