Web indexing is a process of adding your site into the main database by search engines. This way they can evaluate and rank it accordingly based on what’s inside, but most importantly- whether or not you have been removed from their list before! If there are numerous pages which weren't even included in this initial step (such as new content), then find out why exactly? Did someone violate Google's guidelines maybe...? And fix any issues that might've led them astray. Visit W3Schools