SERP Grounding (CONFIRMED/PREDICTED/SERP-ONLY)

SERP Grounding is a reliability classification system that tags sub-queries based on their data source. CONFIRMED indicates an LLM-generated phrase validated by SERP data—the highest reliability level since it shows the model predicted something Google actually confirms. PREDICTED means an LLM-generated phrase without SERP confirmation—a hypothesis requiring validation. SERP-ONLY means a phrase found exclusively in Google data (PAA, Related Searches) that the LLM didn't predict—authentic search data not generated by the LLM.

This tagging enables clear prioritization: CONFIRMED > SERP-ONLY > PREDICTED. SERP Grounding acts as quality control, preventing LLM hallucinations (generated phrases that don't reflect actual search behavior).

For example, an audit might yield CONFIRMED phrases (LLM + SERP match), SERP-ONLY phrases (Google data only), and PREDICTED phrases (LLM hypotheses). Prioritize the CONFIRMED and SERP-ONLY phrases in content plans, adding PREDICTED phrases only after manual validation.