Mambo >= 4.5.1 provides a Caching functionality to cache pages that are called very often - to lower the database load. Loading a file is a lot quicker than parsing it each time from the database using PHP. This is very useful when a lot of queries are run on the database - as mambo-phpShop does when a user views products. Now that Caching has been implemented, you can improve the performance of your Shop by turning on Caching in the Mambo Configuration.
Keeping track of all events that occur on an order is important for the Store owner as well as for the customer. You always wanted to know when you have set an order to a new order status? You always wanted to send a short message to a customer without having to create an email message? Both can be done now with mambo-phpShop's Order History Feature. It is similar to the Order History that can be already found in oSCommerce.