Programming Tutorials

  There are few administrative tasks in mobile development more frustrating than the   app-ads.txt   verification cycle. You have created the file, uploaded it to your hosting provider, and verified it opens in your browser. Yet, the AdMob console persistently flags it as "Not Found" or "Not Crawled." This results in a tangible revenue loss. When AdMob cannot verify your inventory ownership, ad serving is throttled or suspended entirely. The discrepancy between "I can see the file" and "AdMob cannot see the file" usually stems from strict crawler protocols regarding redirects, content types, or server-side routing logic. This guide dissects the crawling mechanism and provides infrastructure-level fixes for Nginx, Apache, and modern Single Page Applications (Next.js/React). The Root Cause: How the AdMob Crawler Works To fix the error, you must understand the crawler's rigid constraints. AdMob does not behave exactly like a standard user browse...