Search relevance problems split into recall vs. ranking failures: offline replay, multi-path recall, two-stage ranking, Learning to Rank, and a 3-phase rollout.
Do not merge search and recommendation. Share the data and recall base, split ranking and strategy, then roll out in four phases with clear engineering metrics.
Semantic search matches meaning with vectors, keyword search matches wording. See how each works, where each fails, and why hybrid search is the default.
Google retired FAQ rich results on 2026-5-7, but FAQPage is still parsed with no penalty. This guide lists which types still work and your priority next steps.
Group keywords by topic and intent so one page owns each cluster; internal links lock the hub-and-spoke hierarchy. Map, link, never reverse the sequence.
WeCom
