Embedded posts are much more easy to read then standard posts, and have a more "official" feel to them. A good example of where you might want to use an embedded post is in a rules channel.
Example of standard user post vs an embedded post using carl-bot:
1) To access Carl-bot visit the Carl-bot dashboard here
2) Once you are logged into the Dashboard (you must be an Administrator in the Discord) go to the Embeds section.
3) For simple embeds just fill in the Title field and Description fields, and choose the channel in the Destination section, and click "post":
Thats it. Enjoy your pretty embed posts!