--- title: "What is Crawlers?" url: https://fibr.ai/glossary/crawlers description: "Crawlers, also known as web spiders or bots, are automated programs that scan and index websites for search engines or data collection." last_updated: 2026-05-05T11:56:14.340041+00:00 --- Crawlers, also known as web spiders or bots, are automated programs used by search engines to systematically browse and index webpages. Their primary role is to understand site content, structure, and links so search engines can rank pages accurately and serve relevant results. When a crawler visits a website, it scans text, metadata, URLs, and internal links to map information and store it in a search database. Well-structured websites with clean navigation, sitemaps, and fast performance offer easier crawling and indexing. For instance, Googlebot regularly scans e-commerce sites to identify new product pages, updated pricing, or blog content. If a site blocks crawlers accidentally or loads inefficiently, important pages may fail to rank or even appear in search results. ### Explore more Glossary terms ##### Customer Journey Mapping Customer Journey Mapping visualizes how customers move through stages like awareness, consideration, purchase, onboarding, and loyalty. Read More ##### Customer Journey Management Customer Journey Management focuses on designing, monitoring, and improving the end-to-end experience users have with a brand across channels. Read More ##### Customer Data Platform A Customer Data Platform (CDP) unifies data from multiple touch-points, such as websites, apps, CRM systems, and support tools into a single, persistent customer profile. Read More ##### Customer Acquisition Cost (CAC) Customer Acquisition Cost (CAC) measures how much a business spends to acquire one new customer, including marketing, sales, and sometimes onboarding expenses. Read More ##### Custom Conversion A custom conversion is a user-defined goal in analytics or advertising platforms used to measure specific actions that matter to a business. Read More ##### CUPED CUPED (Controlled Pre-Experiment Data) is a statistical technique used in experimentation to reduce variance and improve test sensitivity. Read More Delaware, USA Subscribe to our newsletter for exclusive updates and insights.