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The Art of SEO: Mastering Search Engine Optimization (Theory in Practice) Highlight

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Through links, search engines’ automated robots, called crawlers or spiders (hence the illustrations in Figure 2-11), can reach the many billions of interconnected documents.

— Eric Enge and Stephan Spencer and Rand Fishkin and and Jessie C Stricchiola

Replicated under Fair Use from The Art of SEO: Mastering Search Engine Optimization (Theory in Practice) by Eric Enge and Stephan Spencer and Rand Fishkin and and Jessie C Stricchiola.