My Google Indexing, Page Dropping, and Keyword Observations
Firstly, Google indexes all pages initially. If you have new pages, Google likes this and indexes them. The indexing process can take up to one month from page creation. It is important for Google to store your pages in its index so that traffic may be sent. If someone is searching for a keyword that exists on a page of your site, then Google may display that page in the results page.
However, Google will drop your pages at their discretion. Perhaps the dropped pages do not have enough content. Or you are penalized for having duplicate pages on your site. Or the page has no inbound links. Or your site has low PR and too many pages. Google, in an effort to reduce the storage space for the index and processing time on the index simply drops pages that it considers weak. It does not want to index every page on the web because it can’t.
If the indexed pages contain keywords that have little competition, then that page will be ranked higher for that keyword in the Google results. But keywords with little competition are not searched as much and result in a low number of hits to your site. When people search for these type of keywords they are known as long tail searches.
If the indexed pages contain keywords that have high competition, then that page may not be ranked or ranked lower. High competition keywords are what site owners compete heavily for and are searched very often. A high ranking for these types of keywords would result in many hits.
Getting your pages ranked highly for high competition keywords has something to do with page rank (PR). My sites do not have high PR and I have not had a high PR site. If your site has an overall high PR, then I would assume more of your pages would be indexed. As a result, you would get more long tail searches. I will tell you more about my thoughts on PR later.