What difference does it make including the @package annotation or not?

Question

I am somewhat familiar with the concept of packages in Java, but I'm new to Wordpress and PHP.

In a template file such as header.php, what is happening when you include the @package notation?

<?php
/*
 * @package MyTheme
 */

Answer 1

Those are PHPDoc tags. They are entirely for code documentation purposes.

Answer 2

Nothing will happen. This PHPDoc tag has no special meaning in WordPress, it is not a header WordPress will parse by default. Use it to group your code internally.

get_file_data() cannot read it because that function needs a : after the identifier (here package).