Discrepency between # of pages and # of pages indexed

[SparkplugDigital]

If you don't have many links to your site yet, I think that could reduce the number of pages that Google keeps in its main index. Google may allocate less resources to crawling your site if you have very little link juice, especially if deep pages on your site have no link juice coming in to them.

Another possibility is if some of the 10,000 pages are not unique content or duplicate content. Google could send a lot of your pages to its supplemental index if this is the case.

[Dan-Petrovic]

Very good advice in the replies. Everyone seems to have forgotten PageRank though. In Google's random surfer model it is assumed user will at some point abandon the website (after PageRank has been exhausted). This means if your site lacks raw link juice it may not have enough to go around through the whole site structure and it leaves some pages dry and unindexed. What can help is: Already mentioned flatter site architecture and unique content, but also direct links to pages not in index (including via social media) and more and stronger links towards home page which should ideally cascade down to the rest.

[Dan-Petrovic]

Oh yes, Google is very big on balancing and allocation of resources. I don't think 10,000 will present a problem though as this number may be too common on ecommerce and content websites.

[Dan-Petrovic]

Agreed!

[KeriMorgret]

Do you have areas of your site that are distinctively different in type, such as category pages and individual item pages, or individual item pages and user submitted content?

What I'm getting at is trying to find if there's a certain type of page that Google isn't indexing. If you have distinct types of pages, you can create separate site maps (one for each type of content) and see if one type of content is being indexed better than another. It's more of a diagnostics tool that a solution, but I've found it helpful for sites of that size and larger in the past.

As other people have said, it's also a new site, so the lack of links could be hindering things as well.

[Dan-Petrovic]

Great tip. I have seen this happen too (e.g. forum, blog, archive and content part of the website not indexed equally).

[Mont]

We do have different types of pages but Google is indexing all category pages but not all individual content pages.  Based on the replies I have received, I suspect the issue can be helped by flattening the site architecture and links.

As an FYI, the site is a health care content site so no products are sold on the site.  Revenue is from ads.

[Mont]

Thank you to all for your advice.  Good suggestions.

[Thos003]

I have also heard 3 clicks from a page with link juice. So if you have deep links to a page it can help carry pages deeper in. Do you agree?

[Dan-Petrovic]

It's not exactly 3 clicks... if you're a PR 10 website it will take you quite a few clicks in before it gets "tired". Deep links are always a great idea.