Final answer:
Content Marketing is the best tactic for Marquez to promote his beauty product business, as it enables direct connection and engagement with consumers through valuable content.
Step-by-step explanation:
To promote Marquez's beauty product business and achieve marketing goals of brand promotion, enhanced communication, consumer connection through content, and increased customer engagement, the most effective digital marketing tactic would be Content Marketing. This approach is best at storytelling and providing valuable information to consumers, which can help in building brand credibility and loyalty. Engaging content such as how-to videos, blogs about skincare routines, and customer testimonials can help in engaging the audience. Although other marketing tactics like SEO, social media marketing, and email marketing are beneficial, content marketing directly resonates with Marquez's goals of connecting with consumers through content.