Googlebot is the generic name for the automated web crawler software operated by Google.
It discovers, fetches, and downloads webpages across the internet so Google can process their content and potentially add them to its search index.
What Does Googlebot Do?
Googlebot continuously discovers new and updated webpages by visiting URLs, fetching their content, and following links to discover additional pages.
It is an important part of Google’s search process because a page generally needs to be discovered and crawled before Google can process and index its content.
The Two Main Types of Googlebot
1. Googlebot Smartphone
Googlebot Smartphone is Google’s primary crawler for search. It crawls webpages using a mobile-oriented user agent because Google primarily uses mobile-first indexing.
2. Googlebot Desktop
Googlebot Desktop crawls webpages using a desktop-oriented user agent and helps Google understand how pages work in desktop environments.
How Does Googlebot Crawl a Website?
Googlebot follows a continuous discovery process:
Known URLs & Sitemaps → Googlebot Visits → Fetches Page → Reads Content & Links → Discovers More URLs
- Finds URLs: Googlebot receives URLs from previously known pages, links, and XML sitemaps.
- Visits webpages: It requests the webpage from the website’s server.
- Processes the page: Google systems retrieve and process the available content and resources.
- Follows links: Googlebot can discover additional URLs through links on the page.
- Continues crawling: Newly discovered or updated URLs may be scheduled for future crawling.
How Does Googlebot Identify Itself?
Googlebot identifies itself through a User-Agent string when making requests to websites. This allows website owners and developers to understand which crawler is accessing their server.
Does Googlebot Follow Robots.txt?
Yes. Website owners can use the robots.txt file to provide crawling instructions to Googlebot.
For example, a website can use robots.txt rules to prevent Googlebot from crawling certain sections of a site.
However, robots.txt is a crawling control mechanism. It should not be treated as a general method for keeping confidential information private.
What Is Crawl Budget?
Crawl budget refers to the amount of crawling Google is able and willing to perform on a website over a period of time.
Google considers factors such as a site’s size, server performance, and Google’s perceived need to crawl its URLs when determining crawling activity.
Specialized Google Crawlers
| Crawler | Purpose |
|---|---|
| Googlebot-Image | Discovers and crawls images for Google Images. |
| Googlebot-Video | Discovers and crawls video content. |
| Google-Extended | Provides website owners with a control mechanism related to Google’s use of content for certain generative AI training and grounding purposes. |
| AdsBot-Google | Crawls pages associated with Google Ads to evaluate landing-page quality and related factors. |
Googlebot vs Google Search
Googlebot is the crawler that helps discover and fetch webpages. Google Search is the broader search system that processes information, builds its index, and determines which results to show users.
What Can Prevent Googlebot From Crawling a Website?
- Incorrect robots.txt rules
- Server errors or downtime
- Slow or unreliable server responses
- Complex redirect chains or loops
- Technical accessibility problems
- Pages that are difficult for Google’s systems to discover
How Can You Monitor Googlebot?
Website owners can use Google Search Console to understand how Google interacts with their website.
The Crawl Stats report provides information about Google’s crawling activity, while the URL Inspection tool can provide information about a specific URL’s crawling and indexing status.
Why Is Googlebot Important for SEO?
Googlebot is important because search visibility begins with discovery. If Google cannot access and crawl important pages, it may have difficulty processing those pages for search.
Good technical SEO helps Googlebot efficiently discover important content while avoiding unnecessary crawling of low-value or duplicate URLs.
Frequently Asked Questions About Googlebot
What is Googlebot?
Googlebot is Google’s automated web crawler used to discover and fetch webpages for Google’s search systems.
What are the two main types of Googlebot?
The two main Googlebot user-agent types are Googlebot Smartphone and Googlebot Desktop.
Can I block Googlebot?
Website owners can provide crawling instructions through robots.txt, including rules that disallow crawling of specific paths.
Does Googlebot crawl every page on a website?
Not necessarily. Google determines which URLs to crawl and how frequently based on factors such as discovery, URL importance, site size, server capacity, and Google’s crawling needs.
Does Googlebot crawling mean a page is indexed?
No. Crawling and indexing are different stages. Google can crawl a page without necessarily indexing it.
Interview Question: What Is Googlebot?
Answer: Googlebot is Google’s automated web crawler that discovers and fetches webpages so Google can process their content for its search systems.
Interview Tip
“Googlebot finds and fetches webpages; indexing and ranking happen after that.”
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