# Track User Events

Start sending your users' **events** on your app to **Referd**, along with any **metadata** that describes the event. Depending on your **Referd** programs configuration, the user can be rewarded based on the sent events.

Tracked **events** can be app events or server side events depending on how you would like to design your programs. App **events** can be sent via the avialable SDK interface and server-sdie **events** can be sent to **Referd** via the [Track Events API](https://developer.tryreferd.com/api-reference/api-reference/event).

Every `Track Event` call records a single user action. We call these “**events**”. We recommend that you make your event names human-readable, so that everyone can know what they mean instantly.

**Event metadata** are extra pieces of information you can tie to events you track. They can be anything that will be useful while designing your program.

To send Player events from your app to **Referd**, you can use the **`sendEvent`** SDK interface as below.

Import **Referd Sdk**

```typescript
import {GameballSdk} from 'react-native-gameball';
```

Sending event without metadata in the form {String: any}

```typescript
GameballSdk.sendEvent({"review": {}})
.then(response => console.log(response)) // on success
.catch(error => console.log(error)) // on error
```

Sending event with different metadata in the form {String: {String: any}}

```typescript
GameballSdk.sendEvent({
    "Buy": {         
     "Amount": "100",
      "Type": “Electronics”
     }}).then(response => console.log(response)) // on success
    .catch(error => console.log(error)) // on error
```