What is Laravel Job Batching and what problem does it solve?

$batch = Bus::batch([
    new ImportCSV(),
    new SendNotifications(),
    new GenerateReport(),
])->dispatch();
      

// API endpoint
Route::get('/batch/{id}', function ($id) {
    return Bus::findBatch($id)->toArray();
    // Returns: totalJobs, processedJobs(), progress()
});
      

$batch->then(function (Batch $batch) {
    Log::info('All done: ' . $batch->id);
})->catch(function (Batch $batch, Throwable $e) {
    notifyAdmin($e);
})->finally(function (Batch $batch) {
    cleanup();
});
      

Bus::findBatch($batchId)->cancel(); // Stops all remaining jobs
      

fetch(`/api/batch/${batchId}`).then(res => res.json())
// { progress: 67, processedJobs: 6, totalJobs: 9 }