Generally described as renovation at the end of time.
My understanding: Frashokereti helps one to step forward towards betterment towards something fresh.
One’s own betterment and refreshing one’s mind, body and intellect and contribute towards the betterment of all — all of Nature and Creation Empower oneself and the collective.

Frashokereti helps one to live life dedicating every breath meaning one’s very existence, total surrender in thoughts, words and deeds to Ahura Mazda – the energy and vibration that creates everything.

Refresh ourself— Renovate the World
Dr. Karishma Koka