Add zero trust wording

src/pages/how-to/manage-posture-checks.mdx

@@ -1,15 +1,22 @@
 # Manage access with posture checks
 
-NetBird enables administrators to manage network access by creating access policies that dictate
-which peer groups can interact with others in the network.
-Posture checks extend these policies, augmenting their capabilities by allowing administrators to
-enforce access restrictions based on specified criteria. By integrating posture checks seamlessly
-into policy-based ACLs, NetBird evaluates various attributes to determine the eligibility of peers to
+
+NetBird allows administrators to effectively manage network access through the creation of access policies.
+These policies specify which peer groups are allowed to interact with one another, based on port, protocol and network traffic direction.
+
+Posture checks augment access policies by enabling administrators to enforce additional access restrictions based on predefined criteria
+like operating system version, geolocation, NetBird client version, and more. By integrating posture checks seamlessly
+into policy-based ACLs, NetBird evaluates various machine attributes to determine the eligibility of peers to
 connect to the network.
 
+This seamless integration of posture checks into policy-based Access Control Lists (ACLs) ensures that only machines
+complying with the defined security posture criteria can access network resources, enhancing overall network security and aligning
+with the Zero Trust principles.
+
 ## Concepts
 
-There is a number of posture checks that you can choose to enforce access restrictions based on specific criteria.
+There is a number of posture checks that you can choose to enforce network access restrictions.
+NetBird currently supports the following posture checks: NetBird client version check, operating system version check, and geolocation check.
 
 <p>
     <img src="/docs-static/img/how-to-guides/supported-posture-checks-list.png" alt="high-level-dia" className="imagewrapper"/>