A marketing campaign is a strategic display of a business (both online and offline) designed by the marketer or its hired counterpart to increase awareness about a particular product or service among its potential consumers. A campaign has a limited duration, lasts for as long as its purpose is served and is not a continuous activity like SEO or SMM.
Campaigns are targeted towards different goals for different organizations and brands. It could be done to promote a newly launched product or increase the sales of a product in high demand or to create positivity against bad reviews for a product, etc. A well-planned marketing campaign will always be based on a specific goal that self explains the steps and standards of the campaign.