Problem Statement
How do you implement form submission using Server Actions and what advantages do they provide?
Explanation
Create an async function with 'use server' directive that receives FormData as a parameter, extract form values with formData.get('fieldName'), perform server-side validation and mutations like database updates, and return success or error data.
Call the Server Action from a form's action prop passing the function directly for progressive enhancement that works without JavaScript, or use useFormState hook for client-side state management with optimistic updates and pending states.
Server Actions eliminate the need for separate API routes for form submissions, provide automatic serialization of return values, enable progressive enhancement where forms work before JavaScript loads, integrate with useFormStatus for built-in pending states, and allow direct database mutations from forms with type safety.
They simplify form handling significantly compared to traditional approaches requiring manual API calls, state management, and loading indicators, while maintaining security by running all logic on the server.