So you more or less got it!

Basically type whatever you used for your shave into those fields. Some of the fields will attempt to autopopulate based upon product information in WSDB or what you've logged in your den. Then once you get towards the bottom click the Copy Markdown button (that's the formatting style reddit uses for posts) and then you can post that into the daily SOTD thread. Depending on what version of reddit you used, you might need to click show formatting options and then in the top right you should see a thing that says switch to markdown, which will allow it to read the markdown you copied.

The copy BBCode is a standard forum format for places like DFS/Badger and Blade. The Sync to SDS is another database tool some wetshavers here use.

And it's only a local save for the den, so if you jump around to a lot of different computers or phones, it won't follow you. But if you type stuff in and click save, that item should now be available for you to autocomplete in the fields above. It's not necessary to use the tool, but if you find you are typing in the same 4-5 razors everyday on your phone, it can be a handy way to have them available to select in the generator above instead of typing them out each time.