noun
sales promotion; advertising campaign; promotional campaign
Used for a planned marketing or sales push, often limited by season, product, discount, or brand message.
春の割引キャンペーンが今日から始まる。
The spring discount campaign starts today.
新商品のキャンペーンをSNSで展開
They are running a campaign for the new product on social media.
noun
public campaign; movement; drive
Used for organized efforts such as election activity, awareness campaigns, fund-raising drives, recruitment drives, or campaigns for social change.
市は交通安全キャンペーンを行った。
The city held a traffic safety campaign.
学生たちは募金キャンペーンを始めた。
The students started a fund-raising drive.
noun
military campaign
Military-history use for a connected series of operations; in ordinary Japanese, 作戦 or 遠征 may be more natural depending on context.
軍事史の本で、その作戦は「北アフリカ・キャンペーン」と呼ばれていた。
In a military history book, that operation was called the "North Africa Campaign."