2. A computer-implemented method for providing effectiveness indications for social networking activity, the method comprising: identifying a social networking activity performed in connection with a profile associated with a first user; identifying a plurality of actions performed with respect to the social networking activity by one or more other users exposed to the social networking activity, wherein the plurality of actions include explicit actions and implicit actions; for each of the plurality of actions, determining a total number of unique users performing the action; and calculating an activity score for the social networking activity based on the determined number of users performing each of the plurality of actions.
2. A computer-implemented method for providing effectiveness indications for social networking activity, the method comprising: identifying a social networking activity performed in connection with a profile associated with a first user; identifying a plurality of actions performed with respect to the social networking activity by one or more other users exposed to the social networking activity, wherein the plurality of actions include explicit actions and implicit actions; for each of the plurality of actions, determining a total number of unique users performing the action; and calculating an activity score for the social networking activity based on the determined number of users performing each of the plurality of actions. 3. The method of claim 2 , further comprising: receiving a request to provide the activity score; and providing the activity score for display, in response to the request.