This is the 235th most frequent Turkish word.
yardımcı
Assistant; helpful.
In this sentence, 'yardımcı' is used in its meaning as 'helpful' or to denote assistance provided in completing a task.
Ona işte yardımcı oldum.
I helped her at work.
Here, 'yardımcı' describes something that aids or supports a process or activity, referring to the helpfulness of the film.
Bu film eğitim materyali olarak çok yardımcı.
This movie is very helpful as an educational material.
In this context, 'yardımcı' is a noun indicating a person who assists or supports in performing specific tasks.