What is she keeps her phone on silent?

As an AI language model, I do not have access to personal information about individuals unless it has been widely published online. However, I can provide some general information about keeping one's phone on silent:

• Keeping the phone on silent or vibrate mode can prevent it from making noise or ringing loudly in inappropriate situations, such as during a meeting, at the cinema, or in a quiet environment.
• It can also help to reduce distractions and interruptions caused by constant notifications, calls, or messages.
• Some people choose to keep their phone on silent because they prefer to check it on their own terms, and not be constantly bombarded by alerts.
• However, keeping the phone on silent or vibrate mode may also lead to missed calls, messages, or other important notifications, especially if the phone is not constantly monitored.
• To avoid missing important calls or messages, some people set up exceptions or specific ringtones/alerts for certain contacts or apps, while keeping the phone on silent for everything else.