This is the 10th most frequent Turkish word.
tarafından
"Tarafından" means "by" (used to indicate the agent in passive voice).
'Tarafından' specifies the entity (in this case, a group of experts) performing the action in a passive-voiced sentence.
Problemler, uzmanlar tarafından analiz edildi.
The problems were analyzed by experts.
Here, 'tarafından' identifies the means or agent (the project) that provides support.
Çocuklar bu proje tarafından destekleniyor.
The children are supported by this project.
'Tarafından' is used to indicate the doer (agent) of the action that is being carried out on the subject in a passive sentence.