This is the 4945th most frequent Turkish word.
gazetesinde
"In his/her/its newspaper."
The word 'gazetesinde' in this context means 'in his newspaper', showing location or source.
Ahmet gazetesinde önemli bir haber okudu.
Ahmet read an important news article in his newspaper.
The word 'gazetesinde' here refers to 'working for the newspaper', indicating association.
Yerel gazetesinde çalışan birçok gazeteci tanıyorum.
I know many journalists working for the local newspaper.
The use of 'gazetesinde' in this sentence highlights 'in the newspaper', showing a possessive and locative meaning.