or what does that even mean?

Question

is it bad if a page is encrypted? why are they and what happens if they are not?

Answer 1

Its not a bad thing. Websites often encrypt certain areas to protect data such as usernames and passwords input by visitors. Another example would be sites dealing with secure payments.

Answer 2

If you're asking what encrypted means, think of it as scrambling the information between your browser and the website, so if someone is peeking at it, they can't read it.