Which HubSpot feature would you use to automate follow-up emails for a campaign?

The correct choice is marketing automation, as this feature is specifically designed to streamline and automate repetitive marketing tasks, including follow-up emails for campaigns. With HubSpot's marketing automation tools, users can create workflows that automatically send personalized follow-up emails based on specific triggers, such as user behavior or engagement with previous emails. This not only saves time but also ensures consistent communication with leads, enhancing the overall effectiveness of campaigns.

Utilizing marketing automation allows businesses to effectively manage their email outreach, segment audiences, and tailor content to specific recipient needs, resulting in higher engagement rates. This automation can significantly boost operational efficiency and improve the chances of converting leads into customers by ensuring timely and relevant follow-ups.

Other options like lead generation, sales pipeline, and contact management serve different purposes. Lead generation focuses on acquiring new leads, the sales pipeline deals with tracking the stages of potential customers in the sales process, and contact management is concerned with organizing and maintaining contact information. These functionalities do not directly relate to the automation of follow-up emails in a campaign context.