Form question

Question

Does form alter the code by the “submit”.
Example:
I fill out a form about age.
(Question 2: if its sent to the server. What is that ‘server’)
I click “submit”
(Question 3: is it posible If the person makes it so that the submitted information is visible to other people)

Answer 1

Question 2:
The reciever of your information

Question 3:
It depends
If form method = 'get', then it will be visible
and if form method = 'post', then it will be secured

Answer 2

How about post?

Answer 3

What does it mean to be secured

Answer 4

Secured means that no one can access your information, even server cannot