I just completed Module 2 of the LLM Zoomcamp 2026 by @DataTalksClub — and this module completely changed how I think about search. Module 1 taught me RAG and agentic pipelines. Module 2 taught me that the search step inside RAG matters far more than I realized — and that keyword search is only half the story. Here's everything I built and learned. What Is Vector Search and Why Does It Matter? Traditional keyword search matches words. If you search for "enroll", it f...