I have just installed a theme extension which allows first post on any topic to have a Table of Contents
What is a table of conents?
It is an index which contains all important points of a long text
We use them, for example, in our documentation (the column at the right):
How can I use it?
Just click on the 
icon when composing a topic, and select Insert a table of contents:
Everything will be automatically added!
Where can I check a preview?
You can find a preview on this topic, but if you want a more detailed one check the following topic: Kodular Draco 🐉
It works on both desktop and mobile:
DiscoTOC - automatic table of contents - theme - Discourse Meta
This topic will contain a table of contents