This is the 4849th most frequent Polish word.
organizowanego
"Organizowanego" means "organized" (referring to something being arranged or coordinated).
In this context, 'organizowanego' describes the genitive singular masculine noun 'koncertu', emphasizing that it is being organized by the mentioned entity.
Wzięłam udział w koncercie organizowanego przez miejscową społeczność.
I took part in a concert organized by the local community.
Here, 'organizowanego' modifies the genitive singular masculine noun 'warsztatów', indicating the origin of the event.
Zapisałem się na warsztaty organizowanego w naszej szkole.
I enrolled in workshops being organized at our school.
In this instance, 'organizowanego' pertains to the genitive singular masculine noun 'projektu', specifying its attribute of being conducted by the specified organization.