Definition Day: Crawler A Crawler, or Web Crawler is a program that systematically browses the World Wide Web in order to create an index of data. Get FREE access to our Download-Ables resources by filling in the fields below!If you haven’t already, sign up for this blog and Get FREE access to all our Download-Ables resources and start improving your video marketing right now! Button: Got it: Sign me up! yes, Sign Me Up! Check your inbox for the resources!