The basic scheme of end-to-end analytics

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The main drawback of the scheme is that a person is identified by cookies in the browser. And this is not the most reliable identifier. If the user changes the device or browser, the analytics system will record two different visitors. The same thing will happen if a person clears the cookie - all his previous history will be reset.
Even if the buyer has exposed his phone number and email, and then made an order from another device, the data will not be combined without additional settings. When changing the device or browser, the same user identifier - Client ID - will change, and the client information will have to be linked manually.

This error is critical for online stores, where the user's path is difficult and thorny. He can go to the site, register, look at the goods for a long time, choosing from a mobile phone or a home computer, iran consumer email list and ultimately place an order from a work computer on payday. In this case, we will receive unreliable data.

is becoming obsolete also because it only covers the online block. With it, we will not be able to track those users who made a choice online and then went and completed a transaction with a manager at the nearest store or office.