This is the 9241st most frequent Russian word.
созданное
"Созданное" in English means "created" or "that which is created."
Here, 'созданное' functions as a participle in the neuter singular form, referring to something that has been created.
Созданное произведение искусства произвело впечатление на зрителей.
The created work of art impressed the audience.
In this sentence, 'созданное' is used as part of a participial phrase qualifying the noun 'проект' (project).
Проект, созданное ради эксперимента, стал успешным.
The project, created for experimentation, became successful.
The word 'созданное' serves as a participle used substantively to refer to everything that has been created.