The term refers to a software feature available on some Android smartphones designed to filter and block unwanted communications. This functionality primarily targets spam calls and text messages, aiming to reduce disruptions and potential security risks. For instance, a user might enable this feature to automatically reject calls from numbers not present in their contact list or to filter out messages containing suspected phishing links.
The significance of this capability lies in its contribution to improved user experience and enhanced security. By minimizing exposure to unsolicited communications, it helps individuals avoid scams, unwanted solicitations, and potential privacy breaches. Its development stems from the increasing prevalence of robocalls and SMS-based phishing attempts, requiring mobile operating systems to incorporate robust defense mechanisms.