This is the 13567th most frequent Turkish word.
kullanmaları
"Their use" or "usage by them."
Here, 'kullanmaları' is used as a necessity for 'they' to use the device, showing obligation.
Bu cihazın doğru kullanmaları gerektiğini söylediler.
They said they should use this device correctly.
Here, 'kullanmaları' indicates a recommendation or importance attached to how young people use social media.
Sosyal medyayı dikkatli kullanmaları, gençler için önemlidir.
It is important for young people to use social media carefully.
Here, 'kullanmaları' expresses an expectation about the use of the program's new features.