How do search engines find relevant content?

Question

How does Google find relevant content when it\'s parsing the web?

Let\'s say, for instance, Google uses the PHP native DOM Library to parse content. What methods would t

Answer 1

Google for 'web crawlers, robots, Spiders, and Intelligent Agents', might try them separately as well to get individual results.

• Web Crawler
• User-Agents
• Bots
• Data/Screen Scraping

What I think you're looking for is Screen Scraping (with DOM) which Stack has a ton of Q&A on.