Jetpack is a plugin for WordPress that provides various tools to enhance website security, performance, and growth. It includes features such as site backup, anti-spam protection, site search, and analytics. Jetpack also offers an AI assistant to help with content creation, which can generate blog posts, pages, lists, and tables on command. The AI assistant also includes advanced spelling and grammar correction, tone adjustment, and translation features. Jetpack is available for free with limited features, or users can upgrade to a premium plan for additional benefits.