Usage patterns
〈事〉を大々的に宣伝するto advertise something on a large scale
They advertised the new product on a large scale.
〈事〉を大々的に報道するto report something extensively in the media
The incident was extensively reported on TV.
大々的な〈事〉a large-scale (event, campaign, etc.)
The company launched a large-scale campaign.
大々的に〈動詞〉to do something in a big, public way
They celebrated the launch of the new product in grand fashion.
