If your webpage is displaying ads unexpectedly, it could be due to various reasons, and it’s important to investigate to ensure the security and integrity of your website. Here are some steps you can take to address this issue:

1. Review Your Website Code:
   • Examine the HTML, CSS, and JavaScript code of your website to identify any unauthorized or suspicious code. Look for unfamiliar scripts, iframes, or external links that might be injecting ads.
2. Check Your Content Management System (CMS):
   • If you are using a CMS (e.g., WordPress, Joomla), check for any unauthorized plugins, themes, or extensions. Malicious plugins can inject ads into your site.
3. Scan for Malware and Vulnerabilities:
   • Run a security scan on your website to check for malware or vulnerabilities. Use reputable security tools or online scanners to identify and clean any malicious code.
4. Check Ad Network Integrations:
   • If you intentionally display ads on your site, review the configurations of your ad networks. Ensure that you are using reputable and trustworthy ad providers. Malicious actors may attempt to inject unauthorized ads.
5. Check Server and File Permissions:
   • Review the file and directory permissions on your server. Ensure that only authorized users have write access to files and directories. Incorrect permissions can make it easier for attackers to modify your files.
6. Update Your Software:
   • Ensure that your website’s software, including the CMS, themes, plugins, and any third-party libraries, is up to date. Outdated software can have security vulnerabilities that attackers may exploit.
7. Change Passwords:
   • Change the passwords for your website’s hosting account, CMS, and any other relevant accounts. Use strong, unique passwords to enhance security.
8. Monitor Server Logs:
   • Review the server logs for any unusual activity or access patterns. Check for unauthorized login attempts or changes to critical files.
9. Google Search Console:
   • If your site is being flagged for malicious content, check Google Search Console for any security issues or warnings. Google may provide information about the detected issues.
10. Revert to a Clean Backup:
    • If you have a recent clean backup of your website, consider reverting to that version to eliminate any injected code. Ensure that the backup is from a point before the issue occurred.
11. Implement Content Security Policy (CSP):
    • Implementing a Content Security Policy can help prevent the execution of unauthorized scripts on your website. CSP headers can be configured in your web server or added directly to your web pages.
12. Consult with Security Professionals:
    • If you’re unable to identify and resolve the issue, consider seeking assistance from security professionals or your hosting provider. They can conduct a thorough security audit and provide guidance.

Taking prompt action to address unauthorized ads on your website is crucial to maintain your site’s integrity and user trust. Regularly monitoring your website for security issues and keeping software up to date can help prevent such incidents in the future.