!!! Overview
[{$pagename}] ([IDFA]. [advertisingIdentifier]) is an [Advertising ID] and is a [random] [device] [Unique Identifier] assigned by [Apple] to a user’s [device]. 


[Advertisers] use this [identifier] to track [data] so they can deliver customized [advertising].

[{$pagename}] reveals no personal information. Instead, it’s used for tracking and identifying a user, which then allows advertisers to access aggregated data which can be used to discover information – such as which in-app events they trigger.

[{$pagename}] can also identify users when they interact with a mobile advertising campaign, provided the channel offers [IDFA] tracking and that the advertiser tracks users who interact with adverts successfully. If this occurs the IDFA can pickup whether specific users click an advert for payment and attribution purposes.

Users can opt out of all remarketing by enabling a device setting called "__Limit Ad Tracking__" (LAT), which restricts advertisers from using the IDFA for behavioral advertising.*

With the release of iOS6, the [Unique Device Identifier] ([UDID]) is replaced by the [{$pagename}].

[{$pagename}] is used in [Real-Time Bidding]

[{$pagename}] value can be either [Cleartext] or a [hash].

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [ASIdentifierManager|https://developer.apple.com/documentation/adsupport/asidentifiermanager|target='_blank'] - based on information obtained 2019-08-19