Web spiders are also known as web crawlers or bots that crawl the web to collect and index information for search engines. They can also be referred to as web robots or automated agents that automatically navigate the internet to gather data. In addition, they can also be described as web scutters, which is a term used for search engines to crawl the web more efficiently. Another synonym for web spiders is web robots, used to indicate the automated nature of the process. Finally, web spiders can be called web harvesters, with their ability to systematically collect information from the vast expanse of the internet.