Is it possible to substitute dataLayer.push() with dataLayer.unshift()?

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Yes, it is possible to substitute dataLayer.push() with dataLayer.unshift(). However, they have different functionalities.

• dataLayer.push() adds a new element to the end of the data layer array.
• dataLayer.unshift() adds a new element to the beginning of the data layer array.

Therefore, the choice of which to use depends on the order and importance of the data you want to track.