Automated crawling is the process by which search engine bots (also called spiders or crawlers) systematically browse the web to discover, read, and index web pages. Google’s crawler, called Googlebot, continuously crawls the web to keep its index up to date.
How Does Automated Crawling Work?
Search engine crawlers start with a list of known URLs, visit each page, read its content, and follow the links on that page to discover new URLs. This process repeats continuously across billions of pages. When Googlebot crawls your page, it reads the HTML, follows internal and external links, evaluates structured data, and sends all of this information back to Google’s indexing infrastructure.
What Affects How Google Crawls Your Site
- Crawl budget: The number of pages Google will crawl on your site within a given period. Large sites with many low-value pages can exhaust their crawl budget before Googlebot reaches important content.
- txt: A file in your site’s root directory that tells crawlers which pages or sections they are allowed to or not allowed to crawl.
- Internal linking: Pages with no internal links pointing to them (‘orphan pages’) are often missed by crawlers entirely.
- Server speed: Slow servers cause Googlebot to crawl fewer pages per visit to avoid overloading your server.
- XML Sitemap: Submitting a sitemap to Google Search Console directly tells Googlebot which URLs you want crawled and indexed.
| Example: If your e-commerce site has 50,000 product pages but also generates 200,000 faceted navigation URLs (like /products?color=red&size=M), Googlebot wastes crawl budget on those filter pages instead of crawling your actual product pages. |
FAQs
How often does Google crawl my site?
It varies enormously based on site authority, update frequency, and server speed. A major news site may be crawled every few minutes. A small new website may be crawled once every few weeks. Publishing fresh content and earning links generally increases crawl frequency.
Can I stop Google from crawling specific pages?
Yes. Use robots.txt to block entire sections, or add a noindex meta tag to individual pages. Note that robots.txt blocks crawling but not indexing (Google may still index a blocked URL if other sites link to it). The noindex tag prevents indexing even if the page is crawled.
Related Terms: Googlebot · Crawl Budget · Robots.txt · Sitemap · Indexing
