Badge is a small status indicator for another element.
<div class="card">
    <h:form>
     <h5 class="mt-0">Numbers</h5>
     <p:badge value="2" styleClass="mr-2"></p:badge>
     <p:badge value="8" severity="success" styleClass="mr-2"></p:badge>
     <p:badge value="4" severity="info" styleClass="mr-2"></p:badge>
     <p:badge value="12" severity="warning" styleClass="mr-2"></p:badge>
     <p:badge value="3" severity="danger" onclick="alert('danger clicked!')"></p:badge>
     <h5 class="mb-4">Positioned Badge</h5>
     <p:badge value="2">
         <i class="pi pi-bell" style="font-size: 2rem"/>
     </p:badge>
     <p:badge value="10+" severity="danger">
         <i class="pi pi-calendar ml-4" style="font-size: 2rem"/>
     </p:badge>
     <p:badge severity="danger">
         <i class="pi pi-envelope ml-4" style="font-size: 2rem"/>
     </p:badge>
     <h5>Button Badge</h5>
     <p:badge value="8">
         <p:commandButton value="Emails"/>
     </p:badge>
     <p:badge value="8" severity="danger">
         <p:commandButton value="Messages" icon="pi pi-users" styleClass="ml-4" />
     </p:badge>
     <h5>Sizes</h5>
     <p:badge value="2" styleClass="mr-2"></p:badge>
     <p:badge value="4" styleClass="mr-2" size="large" severity="warning"></p:badge>
     <p:badge value="6" size="xlarge" severity="success"></p:badge>
     <h5>Hidden</h5>
     <p:badge value="0" visible="false">
         <i class="pi pi-bell" style="font-size: 2rem"/>
     </p:badge>
     
     <h5>Icon</h5>
        <p:badge icon="pi pi-bell" severity="danger">
            <p:commandButton value="Alerts" />
        </p:badge>
        <p:badge icon="pi pi-envelope" severity="danger">
            <p:commandButton value="Emails" styleClass="ml-4"/>
        </p:badge>
        <p:badge icon="pi pi-plus" iconPos="left" value=" 99" severity="danger" >
            <p:commandButton value="Left Icon" styleClass="ml-4"/>
        </p:badge>
        <p:badge icon="pi pi-plus" iconPos="right" value="99 " severity="danger">
            <p:commandButton value="Right Icon" styleClass="ml-4"/>
        </p:badge>
    </h:form>
</div>