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Hello Ashish, indexing and caching of pages depends upon many factors :- (1) dynamic nature of website (2) frequency and priority of webpages in XML sitemap (3) posting of webpages in G+, twitter and other social sites, freshness and uniqueness of content and lastly how popular your website. Its good new that Google is crawling website quickly just because of hard work associated with your work. 65% bounce rate is too much. Bounce rate directly depends upon session, session% and number of page view per visit. If you any particular visit in Google analytics, bounce rate shows lesser for visit with good number of page views. Hence more page visit per visitor, lesser bounce rate. To decrease bounce rate, use more related links and images to landing page. Additionally, use of images and inforgraphics can drastically lower down bounce rate and hence good keyword ranking. thanks and cheers

If the PDF is available in other places, then it could be considered duplicate content. If you want to prevent that then no index the PDF. Unless the PDF is something you want to rank for.

The first question I asked in this forum was very similar to this. It can be very difficult to optimize sales pages, especially the long-form very sales-y type. In many cases there really isn't anything you can do to the content because the sales copywriter chooses very specific language to get the message across. Additionally, these pages tend not to be the sort of thing people will link to. What I eventually chose to do was to use the targeted, helpful information page you mentioned to draw in the organic search and not worry about the sales pages beyond title, description, and canonical. However if you do have the option to make your helpful information page and your sales page one and the same, that is a great choice.