Add smart-shield context paragraph to connection-reuse

Author: RebeccaTamachiro

src/content/docs/smart-shield/concepts/connection-reuse.mdx

@@ -7,4 +7,8 @@ sidebar:
 
 import { Render } from "~/components";
 
+Smart Shield leverages Cloudflare's optimized infrastructure to package multiple requests from an [upper-tier](/smart-shield/configuration/smart-tiered-cache/) into a single connection to your origin. This means overall connections to your origin are lowered by 30%.
+
+## About connection reuse
+
 <Render file="connection-reuse" product="aegis" />