SEO for PDF Documents
PDF files are being used more and more by both individuals and corporations. As a result of this they are finding their way onto the internet more often. So here are some cool PDF SEO tips and tricks. If implemented correctly these tips and techniques will get your PDF more exposure on the search engines and also use the PDF’s to pass link juice to important pages on your sites.
Photo by rillian via Creative Commons
- Whenever possible make sure your PDF is created using a method that keeps most of the text as regular formatable text so that the search engines can read and index it.
- You should be able to tell what text is formatable or not in your PDF by selecting some text. If you can select sections of text, such as words or phrases, and copy and paste this text into another program, then it is formatable text, if not you should think about recreating the PDF so that it includes formatable text.
- You can use programs like MS Word or Adobe Pagemaker, so that the final product is text-based and can be crawled.
Optimise the text in the PDF document
- If you are writing or editing the document that will become an online PDF you should optimise it just as you would a regular HTML web page and include important keyword phrases in the body and headings.
- Regular occurrences of the chosen keywords and keyword phrases throughout your PDF document can help the PDF listing reach a higher position in the search results for the particular keywords and keyword phrases used in the PDF.
- A description that includes call-to-action phrases with the keywords being searched on highlighted should encourage more people to click through to the PDF.
Update the Document title
- If possible include an effective call-to-action (that includes your relevant keywords) as the document title, as most search engines will attempt to include the PDF’s document title as the title for the search listing.
- In Acrobat (the development tool. Not the free reader) you can usually access the document title as follows:
o File > Document Info > General, or
o File > Document Properties > Summary
- The combination of a well written document title with the words and phrases being searched for highlighted should help entice people to click-through and look at the PDF document.
Link to the PDF
- To get the PDF indexed in search engines, add one or more links to it from pages on your web site, preferably on pages that are already indexed themselves and that are not too deep within your site.
- The same link authority analysis appears to apply to PDF’s as it applies to regular HTML pages. For targeted keyword phrases you’ll want to apply the same methodologies as you would for a regular web page such as including links to the PDF from other pages.
- Links to the PDF should be created from pages with a high authority ( or PageRank) and that contains related content relative to what information is in the PDF.
Other PDF optimisation Guidelines
- Place a link(s) to your web site and email links within the PDF so that people may contact you or click through to your site while online (link to important pages in your site from your PDF as these links pass some link juice).
- Submit your PDF to PDF specific search engines like http://www.PDF-search-engine.com/
- Your PDF can reside anywhere on your site, but the same rule about spiders not being likely to crawl content that’s too deep applies. The safest thing to do is to put it as close to the root directory as possible.
- Define the document’s and metadata’s properties within the PDF file; this is done in Adobe Acrobat. Details: File -> Document Properties Advanced – > Document Meta-data (use the description menu to define — this will give you the opportunity to fill in the Title/Author, Subject, and Keywords. Use commas to separate the keywords and keyword phrases).
- Include text captions under any photographs or images that are incorporated into the PDF file. The search engines will index the image captions just as they would the “alt attributes” on an image within a website.
- Use related keywords in the actual file name for the PDF file. If you are using a keyword phrase to name the PDF file, use hyphens to make it easy to distinguish all the words used. For example: filename-keyword-phrase.PDF. PDF files often rank very well in search engines.
- If you have a very large PDF, consider breaking it up into several documents. This will ensure that the maximum amount of content gets included in the search engine’s index. Try limit your PDF to a maximum of 100k.
This is a pretty new and untested element of search engine optimisation so I would love your feedback on how some of these tips helped or didn’t help your PDF or Site.
Have a Good Weekend All.