Below is the list of common variables that are in use for all Data Layer implementations:

FIELD	OVERVIEW	EXAMPLE	SYNTAX	REQUIRED
Page Name	A Criteo Data Layer variable that can be used to inform the Criteo engine of the page name the user is browsing. This is an “Extra Data” optional parameter	Search Results	String	No
Page Url	A Criteo Data Layer variable that can be used to inform the Criteo engine of the page url the user is browsing. This is an “Extra Data” optional parameter	https://example.com/category?id=categoryid1	String	No
Page Type	A Criteo Data Layer variable that can be used to inform the Criteo engine of the page type the user is browsing. This is an “Extra Data” optional parameter	Impressions	String	No
Page Category	A Criteo Data Layer variable that can be used to inform the Criteo engine of the page category the user is browsing. This is an “Extra Data” optional parameter	Electronics	String	No
User Logged In	A Criteo Data Layer variable that can be used to inform the Criteo engine if the advertiser’s visitor is logged onto the site or not. This is an “Extra Data” optional parameter	true or false	Boolean	No
User Type	A Criteo Data Layer variable that can be used to inform the Criteo engine of the type of user that is browsing the site. This is an “Extra Data” optional parameter	Regular	String	No
New Customer	A Criteo Data Layer variable that can be used to inform the Criteo engine if the advertiser’s customer is a new customer or not. This is an “Extra Data” optional parameter	true	Boolean	No
User Email - Plain text	The users raw email address, whitespace trimmed and lowercase.	email@domain.com	String	Yes (only if MD5 and SHA256 are not used)
User Email - MD5	The users email, whitespace trimmed, lowercase and MD5 hashed.	7328fddefd53de471baeb6e2b764f78a	String	Yes
User Email - SHA256	The users email, whitespace trimmed, lowercase and SHA-256 hashed.	97817c0c49994eb500ad0a5e7e2d8aed 51977b26424d508f66e4e8887746a152	String	Yes
User Phone Number - Plain Text	User Phone Number - Plain Text	+33140402290	String. Trimmed E.164 format. Number starts with "+" sign, includes the country code and there is no leading 0.	No
User Phone Number - SHA256	User Phone Number - SHA256	f80a807618cce09f81574aad74a3efe06 c27c200d50873754fd287c9f15fea68	String. Trimmed E.164 format including the country code, without the leading "+" sign and SHA256-hashed.	Recommended
Store ID	A Criteo Data Layer variables used to map the advertiser’s physical store ID.	A734Gd87	String	No
Zipcode	The user's zip code.	12345	String	No
Customer ID	A non PII value that can identify a unique user in a client's CRM. Examples: CRM id, user's login. The Result that is passed to the tag mush be MD5 hashed	49f68a5c8493ec2c0bf489821c21fc3b	String	Recommended

Google Tag Manager实现