Thomas Giella discusses several WordPress plugins he finds essential, including Yoast SEO for SEO features, The Events Calendar for creating events, OptinMonster and Bloom for email opt-ins, All In One WP Security for security, Redirection for URL redirects, Simple Social Icons for social media buttons, and Slider Revolution and Shortcodes Ultimate for visual elements. He owns several web design businesses and has been building websites since 2007.