Open Chrome
Tap the three dots
Tap Settings
Tap Site settings
Tap Pop-ups and redirects
Turn Pop-ups and redirects off
Tap Ads
Turn Ads off
Clear Chrome browsing data
Remove suspicious apps
Go to Settings
Tap Apps
Uninstall unknown or unwanted apps
Check app permissions
Disable “Display over other apps” for suspicious apps
Turn on Google Play Protect
Update Android
Update Chrome and other browsers
Use a trusted ad blocker browser
Reset browser settings
Restart the phone