There are a few things you can do to fix invalid traffic: 1. Check your server logs to see where the traffic is coming from. If it's coming from a specific country or IP address, you can block that traffic. 2. Use a tool like Google Analytics to track your traffic. This will help you identify which traffic is valid and which is not. 3. Use a tool like AdBlock Plus to block ads on your site. This will help to reduce invalid traffic. 4. Contact your ad network and let them know about the invalid traffic. They may be able to take action to stop it. 5. Report the invalid traffic to the website where it originated. This can help to stop the traffic from coming to your site.