When should I choose the Brand - Topic hierarchy?
If your organization offers a single product and services relevant to that product, you can opt for the Brand - Topic hierarchy.
Use case
Patricia has an online magazine called "Pat's view" where she discusses her views on current fashion trends and take on it. Now she sends emails relevant to magazine updates, latest offers on fashion brands, coupons offered in her online magazine during special occasions, and a monthly newsletter that highlights the most important topics discussed in that month's edition. The hierarchy for "Pat's view" will be:
If you are looking to handle multiple products or brands, you can check the Brand - Product - Topic hierarchy.