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Why is the data layer preferred over reading values from the DOM?

  1. A It is a deliberate contract with developers that does not break when markup changes
  2. B It loads faster
  3. C It is required by GTM
  4. D It encrypts the values
Answer

It is a deliberate contract with developers that does not break when markup changes

Scraping values from page elements is fragile and breaks silently whenever the site design or class names change.

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