Introduction to Multiple Domain Tracking

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Introduction to Multiple Domain Tracking

Introduction to Multiple Domain Tracking

Domain 101

Domain name refers to a hostname -- for example, www.example.com and www.mysite.com are different domain names. Each domain name represents a numeric IP address on the Internet. DNS helps in mapping a domain name with its respective IP address on the Internet.

Sub-domain is a part of the parent domain for example, secure.mysite.com or blogs.mysite.com will be considered as sub-domains for mysite.com. Sub-domains have their individually qualified hostnames.

Why and When to Use Multiple Domain Tracking

Google Analytics uses first party cookies and thus under the default configuration Google Analytics can't track across sub-domains or across distinct domains. You will need to configure Google Analytics such that the cookie information will be transferred from one domain to another.

Here is why you may want to use multiple domain tracking:

  1. Your parent website has different sections, each of which is represented by different sub-domains (e.g. sales.mysite.com and partners.mysite.com). In this case, you will need to implement sub-domain tracking in Google Analytics.
  2. Your website redirects your visitors to a separate checkout website to complete their purchases. In this case, you will need to implement cross-domain tracking in Google Analytics.
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