difference between "authorization" and "honor"

[RyoHi]

[Integration feature] -> [PayPal Checkout] -> [Authorize and Capture Funds]

What is the exact difference between "authorization" and "honor"?

I understand that PayPal honors 100% of authorized funds during three days.

If the three-day period is end, is there any possible for me that can't get money?

         ->If yes, what "authorization" means?

I'm looking this site.

https://developer.paypal.com/docs/checkout/integration-features/auth-capture/#

Thanks.