The webinar introduces Censys, an internet scanning company, and its Censys search tool, which allows searching by various criteria and offers reporting functionality. It also demonstrates the use of Censys GPT for English language queries and discusses threat hunting approaches. The speaker showcases the tracking of malicious infrastructure, including identifying C2 servers, analyzing activity over time, and searching for indicators of compromise. Plans for future improvements, usage of command line tool 'census,' and support resources for different queries are highlighted. The talk also covers the categorization of C2s, addressing questions about bypassing web application firewalls, and explaining the use of sensors for threat detection.