Audio usage is measured in streams.
An audio stream is a single audio playback instance. Whenever your SitePal character speaks, the audio is streamed from SitePal's servers over the Internet. This counts as 1 audio stream. Simply put, audio streams are the number of times your SitePal character speaks.
For example, if your SitePal character is on a web page that receives 10,000 page-views you should expect to use 10,000 audio streams. Similarly, if a visitor plays an audio message five times in a single session, then five audio streams will have been consumed. To optimize your use of audio streams & improve user experience, you may set a "playback limit". Several playback limit options are available to you to finetune stream use.
Each SitePal package is bundled with a different number of audio streams so you may choose a package that best serves your website needs. Should you run low on streams we will send you an automated email message, so that you may purchase additional streams or upgrade to a different package. Unused audio streams are rolled over into the following month.