Why a pic when importing?

I understand why we need text and audio files but what is the goal of the pic ? Do you want a pic of me or one about the lesson or a colored one to make the site more beautifull ?

The best would be a picture of the topic, while if you upload a lot of content and you are provider, you could of course attach a picture of yourself in that particular field. As an example, I’ve attached a picture of the Grimm brothers to the fairytales I’ve uploaded, and stated Librivox as the provider (in which case the logo is included).