what is include in sequelize code example

Example 1: sequelize include only

Payment.findAll({
    where: {
        DairyId: req.query.dairyid
    },
    attributes: {
        exclude: ['createdAt', 'updatedAt']
    },
    include: {
        model: Customer,
        attributes:['customerName', 'phoneNumber']
    }
})

Example 2: in in sequelize

await Tag.findAll({
  where: {
    id: {
      [Sequelize.Op.in]: [1, 2, 3, 4]
    }
  }
});