Answer:
They provide buyers with "anytime, anywhere" access to products.
Explanation:
Direct marketing is an advertising technique carried out by a producer that bypasses retailers, e.g. catalog distribution, phone calls, promotional letters, etc.
Digital marketing is advertising carried out through digital media channels, etc. google ads, websites, social media, etc. Digital marketing can also be direct advertising, although not necessarily.
The advantage that both types of advertising offer over traditional retail marketing is that you can order the products or services from anywhere and anytime, e.g. you can call a sales call center and order some goods or services, or you can place an order on the company's website or online retailer.