Which of the following best describes the concept of "Pay-Per-Click (PPC)" advertising in digital marketing?
1
A form of advertising where advertisers pay only when a user clicks on their ad
2
A method of optimizing content to appear higher in organic search results
3
A strategy where advertisers pay a flat fee for each ad placement
4
A form of advertising in which companies pay influencers to promote their products
5
A method of advertising using email to reach a target audience