Quoted By:
Friedrich Nietzsche, first influenced by Schopenhauer, developed afterward quite another attitude, arguing that the suffering of life is productive, exalting the will to power, despising weak compassion or pity, and recommending us to embrace willfully the 'eternal return' of the greatest sufferings.
Existential nihilism is the philosophical theory that life has no intrinsic meaning or value. With respect to the universe, existential nihilism posits that a single human or even the entire human species is insignificant, without purpose and unlikely to change in the totality of existence. According to the theory, each individual is an isolated being born into the universe, barred from knowing "why", yet compelled to invent meaning. The inherent meaninglessness of life is largely explored in the philosophical school of existentialism, where one can potentially create his or her own subjective "meaning" or "purpose". Of all types of nihilism, existential nihilism has received the most literary and philosophical attention.
TL;DR - Life is finite and without meaning. It consists of mostly suffering in which we are compelled to invent our own meaning.