diff --git a/gitbook/docs/defining-job-processors.md b/gitbook/docs/defining-job-processors.md
index edcba2d..c6ceca1 100644
--- a/gitbook/docs/defining-job-processors.md
+++ b/gitbook/docs/defining-job-processors.md
@@ -20,9 +20,13 @@ const pulse = new Pulse();
 pulse.define('sendEmail', async (job, done) => {
   try {
     await sendEmail(job.data);
-    done(); // Mark the job as completed
+    
+    // Mark the job as completed
+    done(); // or done(undefined, 'Success');
+    
   } catch (error) {
     console.error('Failed to send email:', error);
+   done(error);
   }
 }, {
   concurrency: 5,
@@ -40,6 +44,8 @@ pulse.define('sendEmail', async (job, done) => {
 
 * **`name`** (`string`): The unique name for the job type. This name is used to refer to and manage jobs of this type throughout their lifecycle.
 * **`processor`** (`Processor<T>`): The function that contains the logic to be executed when a job of this type is processed. The function receives a `Job` object and an optional `done` callback that should be called when the job processing completes.
+  * **`job`** (`Job<T>`): The job instance being processed. This object contains all data and methods related to the specific job, allowing the processor to access job data and interact with the job's lifecycle.
+  * **`done`** (`(error?: Error, result?: unknown) => void`): A callback function that should be called once the job processing is completed or if an error occurs. Calling `done` with an `Error` object indicates that the job has failed, whereas calling it with no parameters or a result indicates successful completion.
 * **`options`** (`DefineOptions` - optional): Configuration options for the job, which include:
   * **`concurrency`** (`number`): Maximum number of instances of the job that can run simultaneously. Defaults to `Pulse`'s `_defaultConcurrency`.
   * **`lockLimit`** (`number`): Maximum number of instances of the job that can be locked at once. Defaults to `Pulse`'s `_defaultLockLimit`.