About Google indexing
 

Indexing of website is really very important, without indexing no search engine will allow the website to run in them. Each search engines have their own algorithm to index the websites, so you must follow their algorithm properly before getting your website indexed. Google is bit strict while indexing, so it is advisable that you follow the algorithm properly. For better indexing of website in Google, you must have good quality content in your website, and then it will not take much time for indexing. Moreover, you should not make use of unethical SEO methods for optimization. If you do so, you will not get good results for your website.

thanks for your sharing, it is the process of fetch the URL and save the copy of the site to store the data base.