Any product can have a vast range of colours / sizes and other options added via the OPTIONS/SIZES tab. As well as unlimited customisations options including file uploads.
You can promote individual products to appear on your template borders, or checkout pages, or auto suggest products at checkout based on others order history.
You can add a short description to your Product by adding text to the details area, found it the Basic Product Description section, when creating a new Product
While the Basic Product Description area only allows for text in the Details: field, you can use the Short Product Description Rich Text Editor option to add links or other HTML styling.