How to copy Metadata to several hundred pages?

i have site few hundred pages. need put following metadata of every page. there way globally, or must copy , paste page properties/metadata requester of every page?

 

i rather globally, if need change later.

 

here code need insert.

 

<style>

 

html

{

overflow:hidden;

}

 

body

{

position:absolute;

width:1280px;

height:720px;

z-index:4;

-webkit-transform: rotate(-90deg);

left: -250px;

}

 

</style>

 

i tried inserting site_global.css of exported site, brok whole site. not sure why.

this not best practice, if u want avoid place manually on each page can embed code master page.

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