I am trying to insert a notifications tooltip in my dashboard page, but the tooltip is not working. I am very new to Angular, so any leads regarding this will be highly appreciated.

**`module.ts`**

```typescript
..
    import {MatTooltipModule} from '@angular/material';
..

@NgModule({
..
MatTooltipModule
..})

```

**component.html**

```xml
    <div class="notifications">
        <i class="fa fa-bell fa-2x" aria-hiden="true" matTooltip="Tooltip!"></i>
    </div>

```