Here is a link to the 2023 ARRL Field Day Packet. It is a comprehensive 38 page document with all the details and rules about Field Day. It includes everything you need and want to know about Field Day and more! See what it’s all about and understand the rules!
https://www.arrl.org/files/file/Field-Day/2023/2023%20Field%20Day%20Packet%20v2.pdf