nihilism has many aspects to it. there is a philosophical form, epistemological form and a metaphysical form. each form of nihilism deals with different question, has a different purpose. the philosophical nihilism questions if values really exist.it state that the values we have today are those we created and do not have meaning. every thing is viewed on an even ground and no ine value is greater of better than the next.
epistemological nihilism which is another form of philosophical nihilism denies the fact that knowledge truly exists. this form of nihilism i do not understant quite well because how can we explain our general knowledge of nihilism to begin with.
And finally metaphysical nihilism, this form of nihilism ask whether object really exist, cars, computers clothes, basically materials we can not live without today.