Hollie had a successful year of marketing projects at TREW Marketing. She researched potential clients and created an email campaign. She wrote blog posts on various topics like QR codes and social media advertising. Hollie tested Facebook and LinkedIn advertising and found that LinkedIn produced more impressions. She helped market TREW's book "Smart Marketing for Engineers" through various efforts like a landing page, email blast, and banner ads. This led to a 600% increase in web leads during the book launch.