Katja Kupka is a social media and PR specialist. She writes for corporate blogs and trade magazines. The former banker advises companies, NPOs and freelancers and manages their social media channels. She offers training in social media marketing and copywriting for online and social media. Her practical guide <a href="https://oreilly.de/produkt/social-media-marketing-praxishandbuch-fuer-facebook-instagram-tiktok-co/" is published by O’Reilly.