45 precisely defined terms across classical SEO, Generative Engine Optimization and entity engineering — with formulas, benchmarks and cross-references to 14 in-depth detail pages. Free, no sign-up, openly citable under CC BY 4.0.
Note: Full English term pages are rolling out. The 14 deep-dive entries below currently link to the German source — each is bidirectionally hreflang-tagged. Most concepts are well-established English terms.