Final answer:
Paid search, display ads, classified ads, and video fall under online advertising, which is becoming more vital due to the decline in traditional advertising effectiveness, with the Internet becoming a key focus for reaching specific demographics.
Step-by-step explanation:
Paid search, display (banner) ads, classified ads, and video are all types of online advertising. The revolution in media and technology has significantly impacted how advertisements reach consumers. As advertising revenue in newspapers and on television has decreased, the shift to online platforms has become more prevalent. Companies now rely on the Internet to deliver their marketing messages more than ever, as traditional methods like print media and radio lose effectiveness in certain demographics. This transition is particularly evident in political campaigning, where strategies are tailored to target demographics, often using a combination of media, with online and social media strategies becoming increasingly essential for engaging younger voter populations.