Update src/engage/audiences/index.md

Author: rchinn1

src/engage/audiences/index.md

@@ -215,7 +215,7 @@ Before you can download the CSV, you will need to generate it. There are three d
 
 ## Identifier Breakdown
 
-The audience summary is a breakdown of the percentages of external_ids of users in the audience. These are the default ID's that have been included in Identity resolution configuration. It shows the portion of the audience that has each identifier, and is used to verify the audience size/profiles are correct and as expected.
+The audience summary is a breakdown of the percentages of external_ids of users in the audience. These are the default IDs that Segment includes in your Identity resolution configuration. Segment displays the percentage of the audience with each identifier, which you can use to verify the audience size and profiles are correct.
 
 > info ""
 > The Identifier breakdown won't show custom ID's included in identity resolution configuration. Only default external IDs will be shown in the breakdown.