Bitrix template - what does bitrix:main.include mean?

Question

PHP

I'm editing the template. More precisely, the content of the main. Sometimes the theme files had inserts like includes/inner-phone.php. With this, everything is clear - just another file with pluggable content.
But I came across such an insert several times bitrix:main.include
and I can’t understand where it leads and how to edit the code in these places.
I understand that these are areas that can only be edited from the admin panel through the components menu by opening the main one?

Answer 1

There is documentation
. In fact, when including such an area, the path to the file that is connected must be specified