Robots.txt: Similar to a stoplight, a robots.txt file provides online search engine spiders or crawlers route. You’ll use this file to allow spiders to crawl your internet site. It's also possible to use it to stop them from traveling to URLs like your paid out landing web pages. information-linked areas, https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ