What do you know about classical music? I enjoy listening to the symphony in my hometown, but I am clueless about it.
I believe Classical music is art music produced or rooted in the traditions of Western culture.It is very secular.
Is it very secular? It seems like I have heard a lot of Christian based classical music.
A more precise term is also used to refer to the period from 1750 to 1820.It is known as the Classical period. 
Oh I see. Maybe I am considering too broad of a term.
Some interpretations can leave less room for practices such as improvisation and "ad libitum" ornamentation.That is common on in non-European art music.
Is that improvisation like Jazz?
Most popular styles like jazz most popular styles adopt the song (strophic) form or a derivation of this form