Hook after product is created or updated

functions.php

add_action( 'save_post', 'product_created_or_updated', 10, 3);

function product_created_or_updated($post_id, $post, $update){
		if ($post->post_status != 'publish' || $post->post_type != 'product') {
			return;
		}

		if ( !$product = wc_get_product( $post_id ) ) {
			return;
		}

		// Make something with $product
		// You can also check $update
}