Engaged Users: The number of unique people who clicked, liked, shared or commented on your Page's content.

Reach: The number of unique people who saw your Page's content.
 

Avg Post ER:

 A single post’s ER: engaged users / reach

A single day’s ER: total engaged users for the day's posts / total reach for the day's posts

Avg Post ER: sum of single day ERs / number of posts in time period

 

Daily Post ER:

A single post’s ER: engaged users / reach

A single day’s ER: total engaged users for the day's posts / total reach for the day's posts

Daily Post ER: sum of single day ERs / number of days in time period

 

Avg Page ER:

A single day’s ER: (likes + comments + shares) / fans on the day / number of posts on the day

Avg Page ER: sum of single day ERs / number of posts in time period

 

Daily Page ER:

A single day’s ER: (likes + comments + shares) / fans on the day

Daily Page ER: sum of single day ERs / number of days in time period

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