Merge pull request #4908 from segmentio/estgc-patch-2

Note about array of objects in the builder.md

Author: rchinn1

src/engage/audiences/index.md

@@ -34,6 +34,8 @@ You can also build Audiences based on custom traits. These traits can be collect
 
 You can also use computed traits in an Audience definition. For example, you can create a `total_revenue` computed trait and use it to generate an audience of `big_spender` customers that exceed a certain threshold.
 
+> info ""
+> Engage supports nested traits, but the Audience builder doesn’t support accessing objects nested in arrays. When you send arrays of objects, they are flattened into strings. As a result, the same conditions that work on strings will work on the array. Within the builder, you can only use string operations like `contains` and `does not contain` to look for individual characters or a set of characters in the flattened array.
 
 ### Funnel Audiences