It is possible you have a malware or virus on your device. Uninstall any apps downloaded from unknown sources, and also download Avast anti virus/malware bytes app. Scan your device with the mentioned apps and see if it solves your issue. Also, go to settings->battery and device care->tap three dots-> update security engine-> then scan through device protection. Updating your phone may also help if available
Maybe from browser, you might have allowed notification from certain website... Or could have installed some app which pushes ads Or in Samsung's apps, there is Customisation service... Check them out if you have disable it or not
We acknowledge your query and apologize for the inconvenience caused to you and will surely assist you regarding the same and please follow the easy troubleshooting steps which might help to solve the issue.
1: Disable the Google ads: Path: Settings > Google > Ads > Opt-out of ads personalization > Disable
2: Disable Google ads settings: Path: Tap on Ads by Google > Add settings > Disable Google ads settings
Kindly check Contain ads function while downloading any app from the play store. (If any application contains ads then it is mentioned under the name of that application while downloading from the play store).
In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report).
Thank you for writing to us. Warm Regards, Samsung Customer Support.
