Chapter 16

1. The crawler downloads web pages and stores their content for the search engine to index it.
2. We call it an inverted index because it maps words back to their locations in documents.
3. Before indexing, tokenization normalizes words.
4. Recommendation engines verify and recommend the best outcomes fitting to the particular request.
5. A knowledge graph is a graph where nodes are topics (the knowledge) and edges are connections between topics.