what's the difference between GET and POST?

Both the GET and POST methods are used in the HTTP protocol to transport data from client to server, but the main distinction between the two is that the POST method is more secure because the request parameter is included in the message body rather being appended to the URL string in the GET method.

There are two HTTP request methods: POST and GET. The typical purpose of GET is data retrieval; it is meant to be idempotent (i.e., the query can be repeated without experiencing any negative consequences), and it can only transmit a certain amount of parameter data to the server. If you're not careful, some browsers will frequently cache GET requests by default.