There are different kinds of mobile or tablet alerts at Trovit depending on the service you are using. If you are receiving alerts from Trovit it's because you have either created an email alert; accepted to receive push notifications from Trovit's website in your mobile web browser; or made a search from any of the Trovit apps and accepted to receive their alerts. Keep in mind that these three platforms are different so the way you create or deactivate the alerts is different too.
To know more about how these different alerts work, read this article.