Google API keys - What is server key and browser key

Question

I ma using google maps in my app, and use the URL as following format without the API key- values,

Answer 1

Try the browser key, found this post, but it's written on 2012,

https://groups.google.com/forum/#!topic/android-gcm/Ir-dNtPRKcU

Found this on web: "2.Click Create new Server key. Either a server key or a browser key should work. The advantage to using a server key is that it allows you to whitelist IP addresses. The following screen appears:"

http://developer.android.com/google/gcm/gs.html

Hope this will help you!