WordPress at a glance
filter is not described

woocommerce_save_settings_(current_tab) filter-hook . WC 1.0

Save settings if data has been posted.

Usage

add_filter( 'woocommerce_save_settings_(current_tab)', 'filter_function_name_5563' );
function filter_function_name_5563( $condition ){
	// filter...

	return $condition;
}
$condition
-

Where the hook is called

WC_Admin_Menus::save_settings()
woocommerce_save_settings_(current_tab)
woocommerce/includes/admin/class-wc-admin-menus.php 134
} elseif ( '' === $current_section && apply_filters( "woocommerce_save_settings_{$current_tab}", ! empty( $_POST['save'] ) ) ) { // WPCS: input var okay, CSRF ok.

Where in WP core the hook is used WooCommerce

woocommerce/includes/admin/class-wc-admin-api-keys.php 22
add_filter( 'woocommerce_save_settings_advanced_keys', array( $this, 'allow_save_settings' ) );
woocommerce/includes/admin/class-wc-admin-webhooks.php 22
add_filter( 'woocommerce_save_settings_advanced_webhooks', array( $this, 'allow_save_settings' ) );