Kundalini is Shakti Energy

Kundalini is Shakti energy. Prana+Intelligence-Consciousness.
It is the feminine principle of universal energy.

Vedic terminology distinguishes “masculine” as pure potentiality without form or activity. The Great All that is without distinguishing characteristics. We could call this "Brahman" or "The Absolute". The deity which exemplifies this principle is Shiva.

The experience of this realm of awareness in spiritual schools is Advaita or nonduality.

The substance of which is ecstatic stillness.

Another name for the substance of this quality in creation is Parusha: the plural immobile cosmic principle, pure consciousness, unattached and unrelated to anything, which is nonactive, unchanging, eternal, and pure.

Within the Absolute, there is also Shakti. The quality of this aspect is vibration-love-bliss.
Her dynamic is life-giving, movement, creative, sexual, sensual, elemental, purifying and transformative.
She is the aspect of creation that brings form out of the complete stillness of the Absolute or Parusha.
Her manifestation is “Prakriti” the prime energetic material of which all matter is composed. Matter… mother. Shakti Ma.

The name of this intelligence-substance which coalesces form out of the Absolute is the Adi Shakti. You love trees, animals, your own body? Thank Adi Shakti.

She is the creative intelligence which anchors conscious/ "the soul" into a human body and also contains within it the potential for the “uncreation” of individual identity in the spiritual process of awaking up out of illusion of separation is Kundalini-Shakti.

A “Kundalini awakened” (meaning a body which has released the coiled kundalini from the root) OR a “kundalini activated” body (meaning a body which is saturated and energized with the field of Shakti) is a bridge for cosmic consciousness, the stillness and transcendence of “shiva”, or non-duality. So on a polarity of movement and infinity to stillness and eternity, shakti is one pole and shiva is the other.