The type of custom audience member, KEYWORD, URL, PLACE_CATEGORY or APP.
value. The CustomAudienceMember value. One field is populated depending on the member type. value can be only one of the following:
A keyword or keyword phrase — at most 10 words and 80 characters. Languages with double-width characters such as Chinese, Japanese, or Korean, are allowed 40 characters, which describes the user's interests or actions.
An HTTP URL, protocol-included — at most 2048 characters, which includes contents users have interests in.
A place type described by a place category users visit.
A package name of Android apps which users installed such as com.google.example.