Merge pull request #4919 from segmentio/sarahrudy-patch-14

Add blurb to GA4 Web docs

Author: forstisabella

src/connections/destinations/catalog/actions-google-analytics-4-web/index.md

@@ -26,7 +26,19 @@ To connect the Google Analytics 4 Web destination:
 3. Click **Configure Google Analytics 4 Web**.
 4. Select the web source that will send data to Google Analytics 4 and follow the steps to name your destination. The web source chosen must use [Analytics.js 2.0](/docs/connections/sources/catalog/libraries/website/javascript/){:target='_blank'}.
 5. On the **Settings** tab, under **Basic Settings**, enter in the [Measurement ID](https://support.google.com/analytics/answer/9539598){:target='_blank'} associated with your GA4 web stream.
-6. Follow the steps in the Destinations Actions documentation on [Customizing mappings](/docs/connections/destinations/actions/#customizing-mappings).
+6. Set up your event mappings by following the steps in the Destinations Actions documentation on [Customizing mappings](/docs/connections/destinations/actions/#customizing-mappings).
+
+After you've set up at least one event in your **Mappings** tab, you can see your events and parameters using the Google [Realtime](https://support.google.com/analytics/answer/9271392){:target="_blank"} and [DebugView](https://support.google.com/analytics/answer/7201382){:target="_blank"} reports. These two reports show you the events users trigger on your website as they occur. The DebugView report requires additional configuration before you can use it. 
+
+Some parameters automatically populate prebuilt [dimensions and metrics](https://support.google.com/analytics/answer/9143382){:target="_blank"} in Google Analytics. For example, the parameters on the automatically collected and enhanced measurement events and the required and optional parameters you send with the recommended events both populate pre-built dimensions and metrics.
+
+With custom parameters, you must create [custom dimensions and metrics](https://support.google.com/analytics/answer/10075209){:target="_blank"} so you can see the parameter values in Google Analytics. 
+
+### Understanding Event Parameters 
+
+Parameters provide additional information about the ways users interact with your website. For example, when someone views a product you sell, you can include parameters that describe the product they viewed, like `product_name`, `category`, and `price`.
+
+The automatically collected and enhanced measurement events include parameters by default. Google also provides a set of required and optional parameters to include with each recommended event. Additionally, you can add more event parameters when you need them.
 
 {% include components/actions-fields.html settings="true"%}
 
@@ -50,7 +62,7 @@ Google Analytics 4 is also case sensitive. If you would like all event names to
 
 ### Custom Dimensions and Metrics
 
-With Google Analytics 4, you must create custom dimensions and metrics within the Google Analytics 4 interface and link event parameters to the corresponding dimension or metric. When creating the dimension or metric, you can either select a parameter from the list of already collected fields or enter the name of the parameter you plan to collect in the future. For more information, see [Google Analytics 4 Custom dimensions and metrics](https://support.google.com/analytics/answer/10075209?hl=en){:target="_blank"}.
+With Google Analytics 4, you must create custom dimensions and metrics within the Google Analytics 4 interface to link event parameters to the corresponding custom dimensions or metrics. When creating the dimension or metric, you can either select a parameter from the list of already collected fields or enter the name of the parameter you plan to collect in the future. For more information, see [Google Analytics 4 Custom dimensions and metrics](https://support.google.com/analytics/answer/10075209?hl=en){:target="_blank"}.
 
 ### Debug Mode