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I keep scrolling down the "New" section for content.

I'm not seeing it. I guess I just get frustrated too easily with sites when I can't figure out how they work. On other sites were I post articles I have the ability to add pictures, links, change fonts, edit certain text to 'bold' or 'italic', etc. I don't see any of that capability on Steemit, although clearly others have found it.

But I'm all for anything that could potentially kill Facebook. I never did join Facebook though, so I never did know how that works either Maybe if I did, this site would make a lot more sense to me. I can't figure out why there is a blog section and then a chatroom. Are the two even related?

Maybe I'm just too old, lol.

The chatroom is separate from Steemit and made by some users on the platform (I forget offhand which devs). My recommendation since you are a stock market kind of guy is to scan through the Steemit whitepaper and read their main site (https://steem.io/) to get a better understanding of the platform.

If you are more just curious about styling

Checkout this guide on using Markdown