This document discusses site-wide metrics and earned media impressions as metrics for public relations (PR) efforts. It makes the following key points: 1. Bigger reach numbers from site-wide metrics do not provide useful information about who engaged with PR content and whether the activity should be repeated. 2. PR professionals should get in the "comparison game" by measuring earned media impressions and comparing them to predicted impressions based on factors like site traffic and authority to better understand PR impact. 3. Smaller PR efforts that generate quality engagements rather than just large impressions should still be considered successful. The goals should be understanding real business outcomes like conversions rather than just vanity metrics.