Spotify today announced “Play,” a widget that lets you embed songs, albums, and even playlists on any website using simple HTML code. Spotify today announced “Play,” a widget that lets you embed songs ...

To add links to your Tumblr bio, you'll need to use a simple HTML code. Tumblr doesn't give you any sort of built-in way to add links yourself, so you'll have to copy and paste the code in manually.