what is {% block content %} and {% endblock content %} for in Django?

Question

so I just started reading a book on Django (for beginners) and I came across the following code snipet:

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Answer 1

block is used for overriding specific parts of a template.

In your case, you have a block named content and this is supposed to be overridden by children that inherit from this template.

From the examples at The Django Docs

Template to be extended, named base.html

Overriding Child template

{% extends "base.html" %}

{% block title %}My amazing blog{% endblock %}

"My amazing site" will be overriden by the child and then display "My amazing blog"