Vercel Cron Jobs allow developers to automate repetitive tasks using a specific syntax called cron expressions, which determine when a task should run. The initial release of Vercel Cron Jobs is a generalized solution that works with any framework or website without native integration, but framework authors can add native support in the future. The limits of Cron Jobs and Vercel Functions include hobby, pro, and enterprise plans with varying numbers of cron jobs and usage per day. Cron jobs are free on all plans during beta, but will be a paid feature for general availability. Developers can get started by deploying an example or reading the documentation, including frequently asked questions about cron job limitations and security.