This is the 15546th most frequent Turkish word.
taraftarlarına
"To their supporters" or "to their fans."
In this sentence, 'taraftarlarına' refers to 'supporters' in the dative form, indicating the direction or receiver of the thanks.
Takım taraftarlarına teşekkür etti.
He thanked the team's supporters.
Here, 'taraftarlarına' is used in the dative case to indicate the group of fans who are receiving the signed books.
Yazar, kitaplarını taraftarlarına imzaladı.
The author signed his books for his fans.
In this example, 'taraftarlarına' is used to show the individuals being addressed by the singer during the event.