By default, WooCommerce will attempt to display your Terms & Conditions inline (i.e., on your Checkout page).
Some site owners prefer to open their terms in a new browser tab so customers have a full view of the information they need to make educated decisions, and that’s where this code snippet comes in.
PHP
function wp_turned_up_woocommerce_checkout_terms_and_conditions() {
remove_action( 'woocommerce_checkout_terms_and_conditions', 'wc_terms_and_conditions_page_content', 30 );
}
add_action( 'wp', 'wp_turned_up_woocommerce_checkout_terms_and_conditions' );