Final answer:
The most effective way for Mariah to optimize her social media campaign is to follow recruiters, personalize invitations, and join relevant groups.
Step-by-step explanation:
The most effective way for Mariah to optimize her social media campaign to drive followers to sign up for their monthly email newsletter is to:
- Follow recruiters, organizations, and employees that interest her on social media to find out about job openings.
- Personalize every invitation and request she sends out to potential followers.
- Join relevant groups and actively participate in group discussions.
By following these steps, Mariah can engage with her target audience and build relationships with the community, resulting in more sign-ups for the newsletter.