Static site is built using html, css etc and their url look like abc.com/hosting.html or abc.com/hosting.htm or even abc.com/hosting.asp abc.com/hosting.php
Dynamic is built using asp or php but with lots of functionality. Their url looks like abc.com/id=3456 session=7675 user=?aaa
Static url is seo friendly as compared to dynamic url.
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They offer many more related services.