yii2-hit-counter

Yii 2.0
1

Where do I put this code

$conf = [
…
];

$conf['modules']['hitCounter'] = [
        'class' => 'coderius\hitCounter\Module',
    ];

$conf['bootstrap'][] = 'coderius\hitCounter\config\Bootstrap';
2

Depends on what is this code is supposed to do and when.