In this article, I tried to systematize information about facts which affecting to the indexing PDF by search engines on the Internet, as well as answers to the most common questions that arise by webmasters using these files on their sites
Any webmaster and SEO-optimizer should understand that the PDF file is the same page of the site as the HTML file. Typically, this file is referenced so that it ends for the search engine because it almost never contains links to other pages of the site
Each PDF-file (as well as the HTML page) is in the index of search engines, therefore, has its own search weight, transmitted by links (PR). In order to edit the PDF, it is not necessary to buy an Acrobat. Take advantage of the free online converter from from PDF to Doc and make some necessary changes to your file. Your conversion from PDF to Word will last not more than three minutes without any installation. It is undesirable to use pictures, because text content of PDF files is more effective for optimization
I highly recommend you make links to the usual HTML pages of the site and other PDF pages in any PDF file which you posted on the site (you can even duplicate the navigation of the main site). In this case, you will only be in a winning position, in addition to transferring the search weight by reference a visitor can return to you by clicking on the link leading to your site by downloading a PDF file. I do not recommend to place both the PDF and the Doc file, but if you still need a Doc for posting (for example, to correct the address), I again advise you to convert to an online converter from PDF to Word Document and place it back on the site, but just one copy of the file only in an editable format. This will be more useful for the user
The PDF file is rarely edited, so it is often kept in its original form, and also how the file archive can rapidly spread through various file hosting, and this, again, new users for your site (the rare case when search engine optimization directly affects non-search progress). That’s why so important to protect your information via password, because somebody can edit it and change your links to his own information. This is one of most useful hidden secrets in PDF SEO optimization: just put some new interesting information inside and let this PDF flow from you website. But pay attention, it must be unique and learning material