This is the 16649th most frequent Russian word.
сертифицированные
Certified.
The word 'сертифицированные' is used as an adjective describing the noun 'продукты', and it indicates that these products have undergone a certification process.
Все наши продукты являются сертифицированными.
All our products are certified.
Here, 'сертифицированные' acts as an adjective for 'специалисты', conveying that the specialists have obtained certification recognizing their qualifications.
На работе требуются только сертифицированные специалисты.
Only certified specialists are required at work.
In this sentence, 'сертифицированные' is an adjective modifying 'курсы', implying that the courses have been officially recognized after meeting the necessary standards.