Product pages can both be overview pages where you gather similar products based on set similar criteria as well as individual product pages where you describe the particular product.
For an overview page, using the catalogue module will immediately give you the set-up and design as it uses tags from the shop database to show the relevant products. This is great when you have a lot of products.
You also have the option to create specific product pages within the site navigation (left-hand navigation). This allows you to give a product page a very unique and specific look with the help of all the different modules available. This option is best used when only have a few products.
The product page example above is a two-column layout page with the shop submenu on the left and a product catalogue module on the right. When you click on a product the module switches to the product view (click on the right arrow to see this example). This setup is best if you have several product categories and you want to make it easy for your customers to navigate.
In this example the product catalogue is featured in full width (single column). At the top is a background image that keeps the look and feel throughout the site with a header indicating the category level of the shop, in this case which region the wine is from.
With mono you have the option to sell products throughout your entire site, not just within your shop area. This is a great way to promote products that are relevant to other areas of your site and perhaps motivate customers to buy from you that otherwise might not have.
In the example above you see a an article of a famous athlete where on the right side there are a few relevant products available for purchase directly from this page. Customers can add the items to their cart without having to leave the page. It's a simple example of a way you can integrate your shop with other more traditional areas of your website.