Shareable links can be created to share content items and information pertaining to activity on those shareable links can be monitored and stored in an online content management service. Based on this activity information, actions can be executed. These actions can include sending notifications regarding link activity, disabling shareable links, and/or updating activity thresholds related to the shareable links. Using the activity information, popular shared content items can be identified and recommendations for sharing unshared content items can be provided to the user. Additionally, advertisements can be tailored to the relative popularity of the shared content items.