This is the 2541st most frequent Turkish word.
oradaki
"The one/thing over there" or "there (belonging to that place)."
Here, 'oradaki' means 'the one over there' and is describing the child who is performing the action of book-reading.
Oradaki çocuk kitap okuyor.
The child over there is reading a book.
In this sentence, 'oradaki' refers to the store and identifies its distant location relative to the speaker.
Oradaki mağaza çok güzel ürünler satıyor.
The store over there sells very nice products.
'Oradaki' is used here to connect the food with the quality and the specific location it was experienced.