from django.db import models

class Ox(models.Model):
    horn_length = models.IntegerField()

    class Meta:
        ordering = ["horn_length"]
        verbose_name_plural = "oxen"
        
        
        //Model metadata is “anything that’s not a field”, such as ordering options (ordering), database table name (db_table), or human-readable singular and plural names (verbose_name and verbose_name_plural). None are required, and adding class Meta to a model is completely optional.

purpose of meta class in django

Model Meta is basically the inner class of your model class. 
Model Meta is basically used to change the behavior of your model fields like changing order options,verbose_name and lot of other options. 
It's completely optional to add Meta class in your model