The plugin is based on the new announced API by Spotify, better known as the Spotify Play Button. With this plugin you can easily share you music with other Spotify users.
You just need to place a Spotify HTML link into your post. The links should look like these:
Customizing the output
To customize the output you need to place your link into the
To use the light theme use
To show the cover art use
To change the height and width of the iframe use
[embed height="xx" width="xx]link[/embed].
Another option is
[embed size="compact"]link[/embed] or
http://open.spotify.com/track/14bppok2E8CC0eTemJc92i will give you this Spotify Button.