To track how each post has performed. Go to Posts, select Published Posts, and click Details. You'll see statistics like the number of people the post has reached, the total number of clicks, and the percentage of engagement, as well as graphs depicting the ratio of reach (your followers and leads from other sources), and more.
Access CRM stats for a post to see the Leads/Contacts engaged. You can also see the CRM status of people who've commented on your posts.