Process suggestions from PCX review

Author: RebeccaTamachiro

src/content/docs/dns/concepts.mdx

@@ -9,19 +9,19 @@ head:
 
 ---
 
-This page defines and articulates key concepts that are relevant to the Cloudflare DNS service and are used in this documentation. For more concepts and broader descriptions, consider the [Cloudflare Learning Center](https://www.cloudflare.com/learning/dns/what-is-dns/).
+This page defines and articulates key concepts that are relevant to the Cloudflare DNS service and are used in this documentation. For more concepts and broader descriptions, refer to the [Cloudflare Learning Center](https://www.cloudflare.com/learning/dns/what-is-dns/).
 
 ## Domain
 
-Also known as domain name, a domain is the string of text that identifies a specific website, such as `google.com` or `facebook.com`. Every time you access a website from your web browser, a DNS query takes place and the domain name is mapped to the actual IP address where the website is [hosted](/fundamentals/setup/manage-domains/).
+Also known as domain name, a domain is the string of text that identifies a specific website, such as `google.com` or `facebook.com`. Every time you access a website from your web browser, a DNS query takes place and the DNS service maps the domain to the actual IP address where the website is [hosted](/fundamentals/setup/manage-domains/).
 
 ## Registrar
 
 Before you can start using the Cloudflare DNS service, you must first have a domain. This is achieved by using a service called registrar. As explained in our [Learning Center](https://www.cloudflare.com/learning/dns/glossary/what-is-a-domain-name-registrar/), a registrar handles the reservation of domain names.
 
 Very often the same company that offers domain registration also offers web hosting and DNS management.
 
-You can register a domain name at cost through [Cloudflare Registrar](/registrar/). Every domain acquired through Cloudflare Registrar must also use Cloudflare as [primary authoritative DNS](#authoritative-dns).
+You can register a domain name at cost through [Cloudflare Registrar](/registrar/). Every domain acquired through Cloudflare Registrar must also use Cloudflare as their [primary authoritative DNS](#authoritative-dns).
 
 ## Nameserver
 
@@ -47,7 +47,7 @@ Finally, as Cloudflare also works as a [reverse proxy](/fundamentals/concepts/ho
 
 ## Zone
 
-DNS zone is an administrative concept used for delegating control over a given domain and its subdomains. You can read more about this in the [specific Learning Center article](https://www.cloudflare.com/learning/dns/glossary/dns-zone/).
+DNS zone is an administrative concept used for delegating control over a given domain and its subdomains. Read more in the ["What is a DNS zone?" Learning Center article](https://www.cloudflare.com/learning/dns/glossary/dns-zone/).
 
 For the purpose of this documentation, keep in mind that each domain added to a Cloudflare account is listed in the account home page as a zone. The exact properties and behaviors of your zone depend on its [DNS setup](/dns/zone-setups/).