Final answer:
Magazine advertising offers the primary benefit of targeting specific demographics, allowing advertisers to tailor their messages to reach a specific group of people.
Step-by-step explanation:
The primary benefit that magazine advertising offers is the ability to target specific demographics. Unlike other forms of advertising, magazines provide opportunities to reach a specific group of people who are interested in a particular topic or have specific characteristics. Advertisers can tailor their messages and content to appeal to these specific demographics and increase the effectiveness of their campaigns.