Big ecommerce websites that sell and frequently update new products online are more susceptible to Google indexing problems. A combination of different factors can contribute to slow website indexing, most of which can be controlled by the webmaster. We'll go over these factors here, as well as what you can do about them.
It is always desirable to have your new product pages indexed as quickly as possible. This can give you a competitive edge over your competitors, if for example you're both competing to launch a similar line of products. Also, having pages well-indexed in Google increases the chances of maximizing web traffic if there are no other issues affecting rankings.
In fact, if you have a poorly-indexed large website, you are losing a lot of valuable traffic. Losing traffic from the search engines means losing sales, which can affect the profitability of your online business.
Quick Basics and Tools
You can quickly check the indexed pages of your website in Google by typing: site:domainname
So for example, if your domain is www.exampleonly.com , to check indexed pages you would type in: site:exampleonly.com
However, this result will give the indexed pages for the whole domain, including the indexed www and non-www URLs, sub domains (if, for instance, you have a sub domain: test.exampleonly.com)
If you only need to know the www URLS, then you should include www in the Google site command: site:www.exampleonly.com
If you need to find out the indexed pages of your sub domain named test.exampleonly.com, then the site command will be: site:test.exampleonly.com
A detailed discussion of search queries is out of the scope of this tutorial. You may, however, refer to the Google document on the topic.
Google Optimization 
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