This is the 13557th most frequent Turkish word.
kullanabileceği
"That he/she/it can use."
The word 'kullanabileceği' is used to indicate potential capability ('can use') of 'her yaş grubu' in relation to the device.
Bu cihaz, her yaş grubunun kolaylıkla kullanabileceği şekilde tasarlandı.
This device is designed in a way that people of every age group can easily use it.
Here, 'kullanabileceği' describes tools ('araçlar') that the students have the capability to use for studying efficiently.
Öğrencilerin, derslerinde daha verimli çalışmak için kullanabileceği araçlar listesi hazırlandı.
A list of tools that students can use to work more efficiently in their lessons was prepared.
In this sentence, 'kullanabileceği' specifies features ('özellikler') that businesses are capable of utilizing easily.