In the latest Webmaster Help video from Matt Cutts, he received a question from Leah in New York, if wanted to know that more indexed pages will automatically equal better ranking on search queries on Google:
As Matt goes on to explain, while more pages that all contain great content as certainly a good thing, webmasters shouldn’t simply create more pages that aren’t useful in order to hopefully increase the index rate and the overall page rank for the website.
While Matt Cutts does assert that having indexed pages that have applicable keywords that users are searching for make them more likely to have a better pagerank, he goes on to further assert that this doesn’t guarantee better page rankings for your entire website.
This latest video is another reminder that when it comes to website page content, quality over quantity is an important guideline.