Kari Kakkonen presented on how to become a multitalented tester. He discussed that testers need skills in testing, domains, technology, and people to be effective. He explained different backgrounds that testers can come from and routes into testing such as education programs. Kari then shared his own journey of taking on multiple roles over time like test manager, agile coach, and author. He offered tips for continuous learning and trying new challenges to expand one's skills.