Adding an audio file to a site or blog can help get a message across. Most computers, tablets, and iPhones are capable of playing audio files if the files are properly embedded in the page. Adding an audio file adds some multimedia function to your site. Camera shy — NO problem; audio can focus on the message: a greeting from the CEO, instructions, weekly update, etc. An audio file does not have to be concerned with visuals but can be transformed to a video if needed down the road.
Radio was around before television and the internet and is still being used. With audios online you get the best of both worlds.