To target specific user segments for the homepage, an Administrator should create Page Variations (D). Page variations allow for the customization of content and layout based on audience segments, such as logged-in users versus guest users, providing a personalized experience based on the user's status or other criteria.

Using Experience Builder, an Administrator can update the Customer's Logo (B), Button Size (C), and Text Color (D) to change the look and feel of the theme of their B2B Commerce site. These options allow for significant customization of the visual aspects of the site, aligning the design with the company's branding and design preferences.

To configure the store to use a new payment gateway, an Administrator needs to Update the payment gateway settings on the Payment and Billing subflow (A). This involves configuring the new gateway's details and parameters within the relevant settings, ensuring that the store's payment processing is correctly aligned with the new gateway.

Supporting store-specific products, including an exclusive line of products for 'premier' status stores, is supported by the B2B Commerce data model (C). This capability allows for the configuration of product availability and visibility based on store status or other criteria, enabling differentiated product offerings across various store types.

If an Administrator is having trouble rebuilding the search index, a potential cause could be the necessary permissions have not been given to the Administrator (A). Proper permissions are required to execute search index rebuilds, and without these permissions, the Administrator may encounter difficulties in initiating or completing the rebuild process.