A cart item with a type of Charge is created with the Cart Delivery Group Method after the shipping integration. A shipping integration is an integration that calculates and applies shipping costs and options to a cart or an order based on various factors, such as product weight, dimensions, quantity, location, and carrier service level. A shipping integration can use either an external shipping service provider or custom Apex code to perform the shipping calculation. The Cart Delivery Group Method is a method that determines how products are grouped into delivery groups based on their shipping methods and addresses. A delivery group is a logical grouping of products that are shipped together using the same shipping method and address. After performing the shipping calculation for each delivery group, the shipping integration creates a cart item with a type of Charge and a charge type of Shipping for each delivery group. These cart items represent the shipping costs and options that are applied to each delivery group. A cart item with a type of Surcharge, Shipping, or Delivery does not exist or is not related to the shipping integration. Salesforce References: [B2B Commerce Developer Guide: Shipping Integration], [B2B Commerce Developer Guide: Cart Delivery Group Method]

Explanation
A best practice when passing query parameters from user interface to an apex controller is to query parameters should be properly sanitized by using JSINHTMLENCODE within the VisualForce Page or Component. This function will encode any special characters in the query parameters to prevent cross-site scripting (XSS) attacks or SOQL injection attacks. For example, ccrz.ccRemoteActions.getProducts('{!JSINHTMLENCODE(searchTerm)}') will encode the searchTerm parameter before passing it to the apex controller. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Security

Explanation
Three steps that are necessary to have a subscriber page added to Salesforce B2B Commerce after creating a custom Visualforce page are:
* Create a new CC Subscriber Page record that points to your custom Visualforce page. This record will store information about the subscriber page, such as the name, description, URL, and Visualforce page.
For example, you can create a new record named MySubscriberPage that points to your custom Visualforce page named MyPage.
* Refresh the Page Keys Index in CC Admin. This action will update the page keys index, which is a cache that stores the mapping between the page keys and the subscriber pages. You need to do this whenever you create or modify a subscriber page record.
* Enable the Subscriber Page in CC Admin. This action will allow you to select the subscriber page from the CC Page Settings configuration and assign it to a CC Page. For example, you can enableMySubscriberPage and assign it to the Home page. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Subscriber Pages