Pay-Per-Click (PPC) is an online advertising model where advertisers pay a fee each time their ad is clicked. This method allows businesses to gain visibility on search engines like Google or social media platforms, driving traffic to their websites. Advertisers bid on keywords relevant to their products or services, and ads appear in search results or on websites that participate in ad networks. PPC campaigns can be highly targeted, allowing advertisers to reach specific audiences based on demographics, interests, and behaviors. The effectiveness of these campaigns is often measured through metrics like click-through rate (CTR) and conversion rate, helping businesses optimize their advertising strategies.