Definition
Web crawling, also known as spidering, is the process by which Internet bots systematically browse the World Wide Web. These bots, often called web crawlers or spiders, are primarily used by search engines to index web content, allowing users to search more efficiently.
User Cases
In real-world usage, web crawlers are employed by search engines to update their indices with new or modified web content. They start with a list of URLs, known as seeds, and follow hyperlinks on these pages to discover additional URLs. This process allows search engines to provide up-to-date search results. Web crawlers are also used for web scraping, data-driven programming, and validating hyperlinks and HTML code.
Why It Matters for SEO
Web crawling is crucial for SEO because it directly impacts how search engines index and rank web pages. Effective crawling ensures that a website’s content is discoverable and can be indexed efficiently. This can lead to better visibility in search engine results, driving more organic traffic to the site. Proper use of web crawling techniques, such as optimizing robots.txt files, helps manage which parts of a website are indexed, enhancing SEO performance.
Related Concepts
Related concepts include web indexing, which is the process of adding web pages into a search engine‘s database, and robots.txt files, which are used to manage crawler access to a website. Other related terms are web scraping, a technique for extracting data from websites, and data-driven programming, which involves using web data for various applications.