To find the types of impressions for your Facebook posts,
- Go to Reports
- Head to Facebook reports
- Under the Reach & Impression section, you'll find the Cards, namely, Organic & Paid Page Impressions vs Reach, and Viral & Non-viral Page Impressions vs Reach.
Organic & Paid Page Impressions, compares the number of times your Facebook Page appeared in a person's feed organically and via ads, with the number of people who clicked your page organically and those via ads.
While Viral and Non-viral Page Impressions and Reach displays the number of times your posts have appeared in a person's Facebook feed organically. Viral Impressions are counted when people outside your page audience view your posts. Non-Viral Impressions are counted when your followers like or view your page posts.