The cart itself is shown every time a customer adds a product to it. Adding twice the same product with the same options has the same result as setting the Qty (Quantity) to 2 and then press the "Change" button.
Clicking the "Remove" button has the same effect as setting the Qty to 0 (zero) and then pressing the "Change" button.
The "Empty Cart" button (if shown) will remove all items from the cart.
"Continue shopping" takes you back to the page you were before arriving here.
Clicking the "Order" button will proceed to the checkout mechanism and may take you to an email page or to a PayPal checkout page.
The Checkout page for simple orders (not PayPal) will use this form. Which fields are required and which are not can be defined in the configuration screen in the admin section of SimpleCaddy.
Once the "Confirm" button is clicked on this screen, an email is sent to the admin of the site, as well as to selected "copy" addresses. These addresses can be defined in the Configuration settings of SimpleCaddy
Now the customer has just placed an order on your site.