Add intro paragraph adding context and value of BYOIP

Author: RebeccaTamachiro

src/content/docs/byoip/index.mdx

@@ -12,11 +12,13 @@ head:
 import { Plan, Description, Feature, CardGrid, LinkTitleCard } from "~/components";
 
 <Description>
-	Get Cloudflare's security and performance while using your own IPs.
+Get Cloudflare's security and performance while using your own IPs.
 </Description>
 
 <Plan type="enterprise" />
 
+Considering [how Cloudflare works as a reverse proxy](/fundamentals/concepts/how-cloudflare-works/), for some customers it may be important to maintain this functionality while also keeping their website or application associated with their own public IP space (instead of Cloudflare's[^1]).
+
 With Bring Your Own IP (BYOIP), Cloudflare announces your IPs in all our locations. Use your IPs with [Magic Transit](/magic-transit/), [Spectrum](/spectrum/), [CDN services](/cache/), or Gateway [DNS locations](/cloudflare-one/connections/connect-devices/agentless/dns/locations/) and [dedicated egress IPs](/cloudflare-one/policies/gateway/egress-policies/dedicated-egress-ips/).
 
 Learn how to [get started](/byoip/get-started/).
@@ -47,4 +49,6 @@ An overview of BGP, RPKI, and other important aspects of Internet routing.
 Explore how you can leverage Cloudflare's platform to create solutions based on your business needs.
 </LinkTitleCard>
 
-</CardGrid>
+</CardGrid>
+
+[^1]: Without BYOIP, when your domain's records are `proxied`, Cloudflare responds with a Cloudflare-owned [anycast IP address](/fundamentals/concepts/cloudflare-ip-addresses/).