How to create additional fields for an article in Wordpress and display them in the admin panel?

Question

WordPress

Hello. I want to create additional fields in the database for articles with the names "structure" and "example"
How can I display them in the admin panel, and then how can I display them in content.php ?
To have a competent conclusion, as usual, the content is displayed with the phrase<?php the_content

Answer 1

ACF
https://www.advancedcustomfields.com/