Define Campaigns in the context of Marketo.

Campaigns in Marketo are sets of rules that execute specific marketing actions based on defined triggers and filters. This definition encapsulates the functionality of campaigns within the platform, which are designed to automate marketing tasks and workflows.

Campaigns allow users to establish criteria for when and how marketing activities should be executed. For instance, they can be set up to respond to specific actions taken by prospects or leads, such as filling out a form or clicking an email link. This trigger-based approach means that campaigns can be highly targeted and effective, as they can execute actions like sending emails, adjusting lead scores, or prompting follow-up tasks automatically based on the established filters or audience segments.

The other options, while related to marketing activities, do not accurately capture the essence of what a campaign is in Marketo. Campaigns are not merely sequences of emails sent at intervals, reports of marketing activities, or collaborative projects; they serve as a structured way to automate and manage marketing processes efficiently through rules and criteria.