Loading a Plugin to a web page

I’m not sure how to get my activated version of MarketPress on my web page. I have downloaded and activated it, it shows in the side bar.

Now how to get it on the page I have made for purchasing my product.
If I bring up plugins in the back end from the dashboard there is an option to deactivated, delete and edit. If I choose edit I see html code.

Should this code be copied and pasted into the edit function of the page?

Or something else?