This is the 1551st most frequent Russian word.
профессиональных
"Professional" (adjective, relating to a profession).
Here, 'профессиональных' is an adjective in the genitive plural form describing 'designers', denoting their profession or expertise.
Он взял курсы для профессиональных дизайнеров.
He took courses for professional designers.
In this sentence, 'профессиональных' is an adjective in the genitive plural form qualifying 'tasks', indicating tasks related to professional work or standards.
Эти инструменты необходимы для профессиональных задач.
These tools are required for professional tasks.
Here, 'профессиональных' acts as an adjective in the genitive plural form describing 'standards', referring to standards related to professions or professional expertise.