diff --git a/content/en/software_catalog/service_definitions/_index.md b/content/en/software_catalog/service_definitions/_index.md
index a58e3b51c4349..ef605c40db326 100644
--- a/content/en/software_catalog/service_definitions/_index.md
+++ b/content/en/software_catalog/service_definitions/_index.md
@@ -32,6 +32,9 @@ further_reading:
 
 Software Catalog uses definition schemas to store and display relevant metadata about your services. The schemas have built-in validation rules to ensure that only valid values are accepted. You can view warnings in the **Definition** tab on the Software Catalog side panel for any selected services. 
 
+{{< callout url="https://forms.gle/fwzarcSww6By7tn39" d_target="#signupModal" btn_hidden="false" header="Opt in to the Preview for the latest version of Software Catalog." >}}
+{{< /callout >}}
+
 ## Supported versions
 
 Datadog supports four versions of the definition schema:
diff --git a/content/en/software_catalog/service_definitions/v3-0.md b/content/en/software_catalog/service_definitions/v3-0.md
index 0ba2fd4d322ee..c26a920b4c92c 100644
--- a/content/en/software_catalog/service_definitions/v3-0.md
+++ b/content/en/software_catalog/service_definitions/v3-0.md
@@ -34,7 +34,16 @@ Schema v3.0 introduces several new features and enhancements to provide more fle
 
 - **Inheritance of system metadata**: Components within a system automatically inherit the system's metadata. It's no longer necessary to declare metadata for all related components one-by-one as in v2.1 and v2.2. 
 
-- **Precise code location**: You can add the mapping of your code location for your service. The `codeLocations` section in v3.0 specifies the locations of the code with the repository that contains the code and its associated `paths`. The `paths` attribute is a list of [globs][4] that should match paths in the repository.  
+- **Precise code location**: Add the mapping of your code location for your service. The `codeLocations` section in v3.0 specifies the locations of the code with the repository that contains the code and its associated `paths`. The `paths` attribute is a list of [globs][4] that should match paths in the repository.
+
+- **(In Preview) Custom entities**: Define custom entity types beyond Service, System, Datastore, Queue, and API. Scope scorecards and actions to specific entity types.
+
+- **(In Preview) Integrations**: Integrate with third-party tools to dynamically source information related to your components (for example, GitHub pull requests, PagerDuty incidents, and GitLab pipelines). Report on and write scorecard rules against any third-party source.
+
+- **(In Preview) Group by product or domain**: Organize components by product, enabling multiple layers of hierarchical grouping.
+
+{{< callout url="https://forms.gle/fwzarcSww6By7tn39" d_target="#signupModal" btn_hidden="false" header="Opt in to the Preview for the latest version of Software Catalog." >}}
+{{< /callout >}}
 
 ## Metadata Schema v3.0
 
@@ -112,6 +121,44 @@ datadog:
       - fp2
 {{< /code-block >}}
 
+### Example YAML for `kind:custom.library`
+{{< code-block lang="yaml" filename="entity.datadog.yaml" collapsible="true" >}}
+apiVersion: v3
+kind: custom.library
+metadata:
+  name: my-library
+  displayName: My Library
+  tags:
+    - tag:value
+  links:
+    - name: shopping-cart runbook
+      type: runbook
+      url: https://runbook/shopping-cart
+    - name: shopping-cart architecture
+      provider: gdoc
+      url: https://google.drive/shopping-cart-architecture
+      type: doc
+    - name: shopping-cart Wiki
+      provider: wiki
+      url: https://wiki/shopping-cart
+      type: doc
+    - name: shopping-cart source code
+      provider: github
+      url: http://github/shopping-cart
+      type: repo
+  contacts:
+    - name: Support Email
+      type: email
+      contact: team@shopping.com
+    - name: Support Slack
+      type: slack
+      contact: https://www.slack.com/archives/shopping-cart
+  owner: myteam
+  additionalOwners:
+    - name: opsTeam
+      type: operator
+{{< /code-block >}}
+
 ### Specify common components that are part of multiple systems
 If a single component is part of multiple systems, you must specify that component in the YAML for each system. For example, if the datastore `orders-postgres` is a component of both a postgres fleet and a web application, specify two YAMLs: