This is the 5652nd most frequent Turkish word.
personeline
"Personeline" means "to its/their staff" or "to its/their personnel."
Here, "personeline" is in the dative case, indicating that the personnel are the indirect object receiving the training.
Şirket, personeline bu konuda eğitim verdi.
The company provided training to its personnel.
In this sentence, "personeline" is used in the dative case to show the target of the explanation.
Yönetim, personeline yeni kuralları açıkladı.
The management explained the new rules to its personnel.
The word "personeline" in this example is again in the dative case and denotes the recipient of the gratitude.