Truth 19. Tag images, audio, video, and other media
If you’ve read any of the other truths in this book, you’ve probably seen one particular truism mentioned more than any other: the fact that search engines can’t “read” anything but plain old text.
A website can teem with lush images, arresting graphics, eye-catching video, toe-tapping music, or fascinating audio interviews and discourses. A page can offer downloads of media, including documents, presentations, spreadsheets, and what-have-you, but as far as search engines are concerned, these are all just so many random bits and bytes. A fundamental component of any SEO strategy is to work to make these diverse types of files count toward search visibility.