Deep Crawling
 

First of course, there will be nearly always be the aforementioned "Home Page." After that, you will usually see pages titled "About Us," "Services," "Testimonials," and "Contact Us." Now and then, you may also see something along the lines of "Portfolio," "Resources," "Certifications," and "Blog," if the site is a combination of website and blog which, for content SEO purposes, it should be. How many of these pages actually create content for the search engines to crawl? Usually there will be four, the Home Page, the About Page, the Services Page, and possibly the Testimonials Page. Share your views on this.

The main advantage of deep crawl is your content will be more accessible to the search engines. Depending on the linking structure there might be difference in your page rank in certain pages.
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Google it....

Do Google...........:)