How do you use revalidatePath to refresh the cache for a specific page after content changes?

You call revalidatePath with the exact path of the page you want to refresh, typically inside a server action or route handler right after a database update completes, and Next.js will discard the cached version of that page so the next visitor gets freshly rendered content.

'use server';
import { revalidatePath } from 'next/cache';

export async function publishPost(postId) {
  await db.post.update({ where: { id: postId }, data: { published: true } });
  revalidatePath('/blog');
  revalidatePath(`/blog/${postId}`);
}