Point to something far from both of you
A modifier meaning 'that ... over there' — placed directly before a noun to point to something far from both speaker and listener.
JLPTN5
あの + [noun]ano + [noun]
that [noun] over there
Example Sentences

That mountain is tall, isn't it

あのひとあの人that personだれ誰?who
Who is that person?
あの always comes right before a noun — it never stands alone. Use it for something far from both you and the listener, and also for something you both already know: あの映画 lands as 'that film, the one we both mean'. When no noun follows, use あれ; for the place itself, あそこ.
Tips and Common Traps
Hana· Key point