Robots.txt: Similar to a stoplight, a robots.txt file supplies online search engine spiders or crawlers course. You’ll use this file to permit spiders to crawl your site. It's also possible to utilize it to halt them from browsing URLs like your paid landing webpages. That has a cell-welcoming web site, https://open.spotify.com/show/6wsyq50NJaM7eq2grQHysB