Explanation
Three ways to test the value of Page Label on any Salesforce B2B Commerce Community Page are:
* Execute CCRZ.pagevars.pageLabels['PAGE_LABEL_NAME'] in the JavaScript console. This will return the value of the page label with the given name from the pagevars object, which contains all the page labels that are used on the page.
* Execute CCRZ.processPageLabelMap('PAGE_LABEL_NAME') in the JavaScript console. This will return the value of the page label with the given name from the pageLabelMap object, which contains all the page labels that are defined in CCAdmin.
* Enable the 'display page label names' in cc admin. This will display the name of each page label next to its value on the storefront pages, which can help identify and verify the page labels. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Page Labels

The out of the box Salesforce B2B Commerce page that can give instructions to web crawlers from accessing specific Salesforce B2B Commerce pages is cc_RobotsTxt. This is a Visualforce page that generates a robots.txt file, which is a text file that tells web crawlers which pages or files they can or can't request from a site. The page uses the configuration settings CO.RobotsTxtAllow and CO.RobotsTxtDisallow to specify which paths are allowed or disallowed for web crawlers. For example, User-agent: * Disallow: /CCCart will instruct web crawlers to not access the CCCart page. Salesforce Reference: B2B Commerce and D2C Commerce Developer Guide, Robots.txt File

Explanation
To implement specific styling for a standard component on a single page of the B2B Commerce store using an Aura template, a developer should create a custom theme layout Aura component that imports the custom CSS file and set up the page to use this theme layout. A theme layout is a type of Aura component that defines the header and footer of a page in the storefront. A theme layout can also import custom CSS files from static resources and apply them to the page. A developer can create a custom theme layout Aura component that imports the custom CSS file that contains the specific styling for the standard component and assign it to the page that needs the custom styling. This way, the custom styling will only affect the standard component on that page and not on other pages that use a different theme layout. Using a custom CSS file in a static resource and adding the import using the Edit Head Markup Editor in the Experience Builder is not a valid way to implement specific styling for a standard component on a single page, as it will affect all pages that use the same template. Creating a custom content layout Lightning web component that imports the custom CSS file and setting up the page to use this content layout is not a valid way either, as it will not affect the standard component that is outside of the content layout. Using the Override CSR Editor in the Experience Builder and adding the desired CSS to change the styles is not a valid way either, as it will affect all pages that use the same template. Salesforce References: B2B Commerce Developer Guide: Theme Layout Component, B2B Commerce Developer Guide: Content Layout Component, B2B Commerce Developer Guide: Override CSR Editor

Explanation
To fire a custom event called CustomEvent from the Lightning web component and propagate it up to the DOM, the developer must set two event settings: bubbles and composed. The bubbles setting determines whether the event bubbles up through the component's ancestors in the DOM tree. The composed setting determines whether the event crosses the shadow boundary and reaches the light DOM. Setting both bubbles and composed to true allows the event to be handled by any element in the DOM that listens for it. The cancelable setting is not required for firing or propagating the event, as it only determines whether the event can be canceled by calling preventDefault() on it. Setting composed to false would prevent the event from reaching the light DOM and limit its propagation to the shadow DOM. Salesforce References: Lightning Web Components Developer Guide: Create and Dispatch Events, Lightning Web Components Developer Guide:
Event Propagation