This feature lets you avail the available formatting options for your text.
How it works:
In a channel, under the option of sending a text, you can avail the formatting options by clicking on the Aa icon.
This feature serves the basic purpose of formatting a text as per requirement. You can make the text look more attractive by using this feature.
Formatting allows you to make required changes to your text. You can make the text Bold Or Italic Or even mention pointers in one message itself, for example you are writing bugs in any of your products to the team, you can list down all the bugs in bullet points availing this feature.