This is the 2394th most frequent Turkish word.
göstermesi
"Showing" or "demonstrating."
Here, 'göstermesi' is used as a verbal noun indicating the act of showing how talented one is, demonstrating its importance.
Bu durum, onun ne kadar yetenekli olduğunu göstermesi açısından önemlidir.
This situation is important in terms of showing how talented he/she is.
In this sentence, 'göstermesi' refers to the act of displaying or demonstrating good teamwork, which has led to their success.
Projede başarılı olmaları, iyi bir takım çalışması göstermesi nedeniyleydi.
Their success in the project was due to showing good teamwork.
Here, 'göstermesi' indicates the demonstration of various skills which serves as evidence of effective planning.