What is it called when??

[cwill2200]

Your site links to another site but the customer never actually leaves your site. Does that make sense? Ex. Someone clicks to print a coupon, it takes them to another site but your header and footer are still there.

[john234]

I would think that your site would either be using an iframe to display the external site into your site, or you are using plugins or widgets.

[shakir]

i think its based on the site property. almost sites are not like this, will open in new window or open in the same page. your linked site will be in standard resolution so if u try to include those sites on your site it will not be looking good size appearances etc... peoples will hesitate to visit on it