Ready Classes are bits of code that you can add to a field to override the form's default styling. Ready Classes are useful because they allow you to quickly and easily create alternative layouts for your form without having to know or write any code. For example, rather than each field existing on its own line, you can use Ready Classes to create a two- or three-column layout and align fields side by side.
Gravity Forms has already created extensive documentation about Ready Classes. To learn more about what Ready Classes are, how to use them, what classes are available and what each class does, check out Gravity Forms' guide: CSS Ready Classes.
To see Ready Classes in action, see our Ready Classes example form.