What's the meaning of CSRF ATTACK in Django?

Django
1

When I submit a form, it gives me an error for csrf attack. so what’s csrf attack?

2

make sure to include a csrf token in your django forms front end like this. This is a security feature from django

<form method="post">
    {% csrf_token %}
    <!-- Form fields go here -->
    <button type="submit">Submit</button>
</form>
3

but I ask why we use CSRF attack. Can you explain why?