Adding metadata to a SimpleDifferent site is actually very easy
In the top right corner of your SimpleDifferent editor there is a key. If you click this key it will bring up a panel where you can easily edit the metadata to the present page.
You may already know ( or think you know ) about keywords and how they relate to search engine optimization but there are a few handy tips that you can implement to make your keywords work for you in an effective way.
<Title>
The title of the page is what will appear on the top of the browser and in tabs. This will help people who are reading your page know where they are. It will also help Google to identify the content and the subject of your page. You should have a title that is both descriptive and easy to understand but also short enough to read easily in tabs or the top of a browser. It should also be a title that is highly relevant to the topic that you are dealing with on that page of your site.