A robots.txt file tells search engine crawlers which URLs the crawler can access on your site. This is used mainly to avoid overloading your site with requests; it is not a mechanism for keeping a web page out of Google. To keep a web page out of Google, block indexing with noindex or password-protect the page.

The message ``Blocked by robots. txt'' means that your website's robots. txt file is preventing Googlebot from crawling those pages. Some Shopify URLs are intentionally blocked by robots. txt to protect your SEO--the cart page is one example. You can find more details on Shopify's robots. txt guide here.

Robots.txt files are particularly important for web crawlers from search engines such as Google. A robots.txt file on a website will function as a request that specified robots ignore specified files or directories when crawling a site.

While using this file can prevent pages from appearing in search engine results, it does not secure websites against attackers. On the contrary, it can unintentionally help them: robots. txt is publicly accessible, and by adding your sensitive page paths to it, you are showing their locations to potential attackers.