This is the 18301st most frequent Russian word.
широкомасштабную
"Broad-scale" or "large-scale."
Here, "широкомасштабную" modifies "исследование" and highlights the extensive scope of the study.
Международная организация провела широкомасштабную исследование экологической ситуации.
The international organization conducted a large-scale study on the environmental situation.
In this sentence, "широкомасштабную" characterizes the program as being comprehensive or covering numerous aspects.
Городские власти начали широкомасштабную программу благоустройства парков.
The city authorities initiated a large-scale program for park improvements.
"Широкомасштабную" describes the marketing campaign as extensive, implying it includes many regions or approaches.