What is andFilterWhere() condition operands purpose?

I'm absolutely new to Yii2 framework. I'm trying to learn filtering, but somehow I don't understand it. I've looked in the documentation, but it didn't helped too. Could someone explain to me what this function does step by step?

public function filteringValues($query)
{   
        $query->andFilterWhere([
            '>',
            'table1.column1',
            date('Y-m-d H:i:s'),
        ]);
    }
}