Once the Cache Information tool of the storefront toolkit is enabled, how can a Digital Developer view caching information for a particular component of the page?

A merchant wants customers to be able to order gift vouchers via their site. Since they can issue an unlimited number of these digital vouchers, this item should be available to sell at all items.
How can a developer use Business Manager to ensure that the gift vouchers are always available?

A developer wants to use an external application to manage their stores information (such as opening hours, and so on), and see their changes in their B2C Commerce Staging instance aas son as they are saved.
What is the appropriate technique the developer should perform to allow the merchant to create a new store in this scenario?

A Newsletter controller contains the following route:
Server.post('Subscribe', function (req,res,next){
var newsletterForm = server.forms.getForm('newsletter');var CustomObjectMgr = require('dw/object/CustomObjectMgr'); if(newsletterForm.valid){ try{ var CustomObject = CustomObjectMgr.createCustomObejct('NewsletterSubscription', newsletterform.email.value); CustomObject.custom.firstName = newsletterForm.fname.value; CustomObject.custom.lastName = newsletterForm.lname.value;-
} catch(e){
//Catch error here
}
}
next();
});
Assuming the Custom Object metadata exists, why does this route fail to render the newsletter template when the subscription form is correctly submitted?

A Digital Developer has identified that the code segment below is causing performance problems.

What should the Developer do to improve the code?