I just install the plugin, but ads are not showing. am very new to this.

[Avatarrunt]

Hello, am new to this is it wired if is asked this, where can I add this script;

let rewarded;
document.addEventListener('deviceready', async () => {
    await admob.start().then(() => {
        console.log('AdMob started.');
    }).catch(e => console.log(e));

    rewarded = new admob.RewardedAd({
        adUnitId: 'ca-app-pub-3940256099942544/5224354917'
    });
}, false)


function Reward() {
    rewarded.on('load', (evt) => {
        await rewarded.load();
    })

    rewarded.load()
    rewarded.show()
}