An adverbial modifier of a word is a (non-clausal) adverb or adverbial phrase that serves to modify the meaning of the word. Note that nouns in particular morphological cases, or followed by an adposition are marked using obl even if they function as adverbial modifiers.
Juda yaxshi bir qiz \n A very good girl
advmod (yaxshi, juda)
Tinmay gaplashishyapti \n They are talking continuously
advmod (gaplashishyapti, tinmay)