Pay per play (PPP) or cash per play (CPP) advertising involves playing an audio advertisement when someone visit your site. These ads usually play when a user visits a specific webpage on your website and they will have the option to stop the ad at any time.

You can use third party advertising networks like Net Audio Ads to set up the ads.

Advantages: Due to the fact that you can set up the ads through an advertising network, it means that the set up is really quick and easy. All you need to do is add some JavaScript to your webpages and you're ready to start generating income.

Disadvantages: Not many people enjoy having audio blasted from their speakers when they get onto a webpage. Not only this, but you'll often find that most users have the volume on their laptop muted whilst browsing in order to avoid ads like this.

If you're going with this option, make sure you monitor the bounce rate on your blog and weigh up the trade-off between monetization and user experience.