AdCheckMe
This timeline focuses on the major shifts that shaped how digital ads are served today. It is intentionally high level and avoids personal data or tracking specifics. The goal is to explain how ad delivery evolved from static placements to dynamic, auction-based systems.
Early web ads were fixed banner placements sold directly by publishers. Buying ads was similar to print: a simple placement on a page, a fixed price, and limited data about performance.
Ad servers introduced rotation, frequency caps, and reporting. Contextual targeting emerged to match ads to page topics, allowing relevance without advanced user profiling.
Ad exchanges brought real-time bidding. Instead of a fixed purchase, each impression could be auctioned. This enabled more efficient pricing and made audience signals and page context central to ad selection.
Mobile browsing changed ad formats and measurement. Responsive placements and new formats emerged, while device signals and coarse location became important for relevance.
Regulatory changes and browser updates reduced reliance on third-party identifiers. The industry shifted toward contextual signals, on-device processing, and aggregated measurement. Ad platforms now prioritize privacy-safe targeting while maintaining performance.
AdCheckMe helps visitors understand how these systems work today. Modern ad selection is a blend of format, context, and high-level signals. The more you understand those inputs, the clearer the experience becomes.
If you have questions, email adcheck.me.team@gmail.com.