GET POST difference

1. POST is superset of get, that is it reads data from querystring as
well as the request body,
whereas GET reads data only from the queryString.
2. Results of GET can be cached, not POST.
3. Sending passwords by GET can expose your password to :
(a) a casual observer looking over your shoulder
(b) someone reading server logs
(c) in referrer information
4. Through POST, you can send more data.
5. resubmitting a POST request prompts(should prompt) user.
6. GET or query string posts are really good for information required
for either bookmarking a particular item, or for assisting in search
engine optimization and indexing items.