MyModelObserver.php

<?php

class MyModelObserver
{
    use TracksHistoryTrait;

    public function updated(MyModel $model)
    {
        $this->track($model);

        // or

        $this->track($model, function ($value, $field) {
            if ($field === 'total') {
                $value /= 100;
            }

            return [
                'body' => "Updated {$field} to ${value}",
            ];
        });
    }
}

can you help me

file path i should deploy like in model and other how some good step u can guide me ?