Goodbyes in Spanish by Sophie Deoliveira
1. what some nice friendly goodbyes are in spanish and translated in English
2. why would you need them
3. which are informally and formal to use
2) You need these goodbyes to be able to end a conversation or at least be polite about talking to the person when you want to leave.
Here's an example:
https://dl-web.dropbox.com/get/Public/hi%2C%20how%20are%20you%2C%20bye.mov?w=e77c0810
3) Well basically everything else you can say to anybody except "Chao" is a type of slang word so you would want to normally use it to a peer or someone younger than you