show your message on the login page

before-login-message

add_action( 'woocommerce_before_customer_login_form', 'before_login_message' );
function before_login_message() {
    if ( get_option( 'woocommerce_enable_myaccount_registration' ) == 'yes' ) {
    ?>
        <div class="woocommerce-info">
            <p><?php _e( 'Returning customers login. New users register for next time so you can:' ); ?></p>
            <ul>
                <li><?php _e( 'View your order history' ); ?></li>
                <li><?php _e( 'Check on your orders' ); ?></li>
                <li><?php _e( 'Edit your addresses' ); ?></li>
                <li><?php _e( 'Change your password' ); ?></li>
            </ul>
        </div>
    <?php
    }
}