Google Spider is also known as Google Bot. It is a powerful software of Google that crawls the websites mean check the site. It’s act like a antivirus software which can scan the whole files of your PC. Google spider accurate runs in the same way. It scans or crawls all websites on the internet. When it crawled complete then , it indexes the website. Indexing means to store the websites on its powerful Search Engine and ranking mean Arrangement or order of sites.
Whenever Google crawls your site, it checks always everything: How many words the article has, what is it’s on-page (Title, URL, Alt Image, focus key word etc), it checks how quickly it loads mean loading time, how many images it has and also images size and images size effected directly loading time of site. It acts like GT Matrix that takes time to scan your site and at the shows the result about your website. Crawling is also takes time. That’s why it’s said to keep your hosting fast so that crawling can be done fast because crawling speed also depend upon hosting speed(Accessing data from hosting).
In this order you can check your site either it’s been indexed by Google or not, use this command of Google “info:www.yoursite.com “(Real Example at Info:www.codeneat.com) If you see result like this i.e., cache etc. it means your site has been indexed successfully. You can aslo check your backlink indexing with this method .