To stop pop-up ads on your Samsung phone, follow these steps:

Identify and Remove Ad-Generating Apps

• Pop-up ads often come from third-party apps recently installed or used on your phone.
• Go to Google Play Store > Menu (3 lines) > My apps & games > Installed > Sort by Last Used.
• Uninstall apps you suspect until ads stop appearing

Adjust Browser Settings to Block Pop-ups and Ads

For Google Chrome:

• Open Chrome > tap 3 dots > Settings > Site Settings > Pop-ups and redirects > toggle off.
• Then go to Ads and toggle off as well

For Samsung Internet Browser:

• Open Samsung Internet > tap 3 lines > Settings > Sites and downloads > toggle on Block pop-ups.
• Go back to Settings > Ad blockers > download and enable a recommended ad blocker

Disable Samsung-Specific Ad Features

• If you use Samsung Global Goals, ads may appear on your lock screen while charging. Disable this in Samsung Global Goals app > Settings > toggle off Global Goals whilst charging

• Opt out of Samsung’s personalized ads:
  Settings > Privacy > Customisation Service > toggle off "Customise this phone" and "Customised ads and direct marketing".
  Then go to Ads > toggle on "Opt out of Ads Personalisation"

Manage App Permissions and Notifications

• Go to Settings > Apps > Special Access > Appear on top and disable this permission for suspicious apps to prevent them from showing ads over other apps

• Disable notifications from apps that push ads, such as Samsung Push Service

Optional: Use Private DNS to Block Ads System-wide

• Settings > Connections > More connection settings > Private DNS > Select Private DNS provider hostname and enter: dns.adguard.com > Save and restart your phone

By combining these steps—removing problematic apps, adjusting browser and system settings, and opting out of personalized ads—you can effectively stop pop-up ads on your Samsung phone.