According to this answer, advaita vedanta goes for the path of knowledge.
What kind of knowledge is required to attain Moksha?
Is it scientific or spiritual knowledge.
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Of course, it is the knowledge of the Self. That's how Shankara starts all his works.
Atma Bodha, verse 2 and 3
Just as the fire is the direct cause for cooking, so without Knowledge no emancipation can be had. Compared with all other forms of discipline Knowledge of the Self is the one direct means for liberation.
Action cannot destroy ignorance, for it is not in conflict with or opposed to ignorance. Knowledge does verily destroy ignorance as light destroys deep darkness.
The ignorance characterised by the notions of I am mine are destroyed by the knowledge produced by the realisation of the true nature of the Self,