What is dynamic? I need a description!!

A dynamic web page is then reloaded by the user or by a computer program to change some variable content. The updating information could come from the server, or from changes made to that page's DOM. This may or may not truncate the browsing history or create a saved version to go back to, but a dynamic web page update using Ajax technologies will neither create a page to go back to, nor truncate the web browsing history forward of the displayed page. Using Ajax technologies the end user gets one dynamic page managed as a single page in the web browser while the actual web content rendered on that page can vary. The Ajax engine sits only on the browser requesting parts of its DOM, the DOM, for its client, from an application server.  

DHTML is the umbrella term for technologies and methods used to create web pages that are not static web pages, though it has fallen out of common use since the popularization of AJAX, a term which is now itself rarely used. Client-side-scripting, server-side scripting, or a combination of these make for the dynamic web experience in a browser.  

everybody they have a little secret something

that they don't wanna tell anybody

because it's shakin'

yeah yeah

like when your hearts racing

from having stage-fright

listen up

say okay i-i understand you but

you don't ever have to hide

no no

just look it in the eye

don't be afraid of letting go!

if you don't try you'll never know

and whoa whoa

if you really wanna win

you gotta dive in

come on now you know it's time

you never know what you may find

and whoa whoa

if you really wanna win

you gotta dive in

yeah yeah yeah yeah

hey!

time to stand up

don't have pretend

and if you mess up

just go and try again

no don't worry

you're surrounded by your friends

yeah yeah yeah yeah

don't have to hide out

don't need to fear the worst

nothing's scary

as they seem at first

hey you're a monster

you can do it that's for sure

come on come on

don't be afraid of letting go!

if you don't try you'll never know

and whoa whoa

if you really wanna win win win win

you gotta dive in

come on now you know it's time

you never know what you may find

and whoa whoa

if you really wanna win

you gotta dive in

yeah yeah yeah

you gotta face your fears

yeah yeah yeah

and they will disappear

yeah yeah yeah

what are you waiting for

yeah yeah yeah

come on

don't be afraid of letting go

if you don't try you'll never know

and whoa whoa

if you really wanna win

you gotta dive in

come on now you know it's time

you never know what you may find

and whoa whoa

if you really wanna win

you gotta dive in