Hover time may suggest interest, yet it does not always mean a person wants follow-up advertising. Someone might be comparing options, reading reviews, or simply leaving a page open. Using this behavior to trigger ads can make marketing feel more personalized, but it can also raise privacy concerns if users are not clearly informed. The best approach is transparency, easy opt-in consent, and simple controls to manage notifications. When users understand how their behavior is being tracked, they can make informed choices.