[all hosts] (VSTO) Add diagram showing relationship to Office Add-ins (#3899)

* [all hosts] (VSTO) Add diagram showing relationship to Office Add-ins

* Updates based on feedback

* formatting

Author: ElizabethSamuel-MSFT

Diff for: docs/images/office-programmability-diagram.png

@@ -1,7 +1,7 @@
 ---
 title: Office Add-ins platform overview
 description:  Use familiar web technologies such as HTML, CSS, and JavaScript to extend and interact with Word, Excel, PowerPoint, OneNote, Project, and Outlook.
-ms.date: 02/07/2023
+ms.date: 03/14/2023
 ms.topic: overview
 ms.custom: scenarios:getting-started
 ms.localizationpriority: high
@@ -21,21 +21,23 @@ Office Add-ins can do almost anything a webpage can do inside a browser. Use the
 
 ## How are Office Add-ins different from COM and VSTO add-ins?
 
-COM or VSTO add-ins are earlier Office integration solutions that run only in Office on Windows. Unlike COM add-ins, Office Add-ins don't involve code that runs on the user's device or in the Office client. For an Office Add-in, the application (for example, Excel), reads the add-in manifest and hooks up the add-in’s custom ribbon buttons and menu commands in the UI. When needed, it loads the add-in's JavaScript and HTML code, which executes in the context of a browser in a sandbox.
+COM and VSTO add-ins are earlier Office integration solutions that run only in Office on Windows. Unlike COM and VSTO add-ins, Office Add-ins are web add-ins and don't involve code that runs on the user's device or in the Office client. For an Office Add-in, the application (for example, Excel), reads the add-in manifest and hooks up the add-in's custom ribbon buttons and menu commands in the UI. When needed, it loads the add-in's JavaScript and HTML code, which executes in the context of a browser in a sandbox.
 
-![The reasons to use Office Add-ins: cross-platform, centralized deployment, easy access via AppSource, and built on standard web technologies.](../images/why.png)
-
-[!INCLUDE [new-outlook-vsto-com-support](../includes/new-outlook-vsto-com-support.md)]
+![A four-quadrant diagram showing the focus areas for different Office extensibility solutions. Office Web Add-ins along with COM and VSTO add-ins target professional developers, while VBA targets end users. Office Web Add-ins are focused on cross-platform experiences and collaboration while COM and VSTO add-ins and VBA cater to the individual's experience on Windows.](../images/office-programmability-diagram.png)
 
 Office Add-ins provide the following advantages over add-ins built using VBA, COM, or VSTO.
 
-- Cross-platform support. Office Add-ins run in Office on the web, Windows, Mac, and iPad.
+- Cross-platform support: Office Add-ins run in Office on the web, Windows, Mac, and iPad.
+
+- Centralized deployment and distribution: Admins can deploy Office Add-ins centrally across an organization.
 
-- Centralized deployment and distribution. Admins can deploy Office Add-ins centrally across an organization.
+- Easy access via AppSource: You can make your solution available to a broad audience by submitting it to AppSource.
 
-- Easy access via AppSource. You can make your solution available to a broad audience by submitting it to AppSource.
+- Based on standard web technology: You can use any library you like to build Office Add-ins.
 
-- Based on standard web technology. You can use any library you like to build Office Add-ins.
+![The reasons to use Office Add-ins: cross-platform, centralized deployment, easy access via AppSource, and built on standard web technologies.](../images/why.png)
+
+[!INCLUDE [new-outlook-vsto-com-support](../includes/new-outlook-vsto-com-support.md)]
 
 ## Components of an Office Add-in
 
@@ -69,9 +71,9 @@ Office Add-ins can do the following within an Office client application.
 
 You can add new functionality to Office applications via the following:  
 
-- Custom ribbon buttons and menu commands (collectively called “add-in commands”)
+- Custom ribbon buttons and menu commands (collectively called "add-in commands").
 
-- Insertable task panes
+- Insertable task panes.
 
 Custom UI and task panes are specified in the add-in manifest.  
 
@@ -103,11 +105,11 @@ You can embed web-based objects called content add-ins within Excel and PowerPoi
 
 ## Office JavaScript APIs
 
-The Office JavaScript APIs contain objects and members for building add-ins and interacting with Office content and web services. There is a common object model that is shared by Excel, Outlook, Word, PowerPoint, OneNote, and Project. There are also more extensive application-specific object models for Excel and Word. These APIs provide access to well-known objects such as paragraphs and workbooks, which makes it easier to create an add-in for a specific application.
+The Office JavaScript APIs contain objects and members for building add-ins and interacting with Office content and web services. There's a common object model that's shared by Excel, Outlook, Word, PowerPoint, OneNote, and Project. There are also more extensive application-specific object models for Excel and Word. These APIs provide access to well-known objects such as paragraphs and workbooks, which makes it easier to create an add-in for a specific application.
 
 ## Code samples
 
-Learn how to build the simplest Office Add-in with only a manifest, HTML web page, and a logo. The following samples will help you get started in the Office host you are interested in.
+Learn how to build the simplest Office Add-in with only a manifest, HTML web page, and a logo. The following samples will help you get started in the Office application you're interested in.
 
 - [Excel "Hello world" add-in](https://github.com/OfficeDev/Office-Add-in-samples/tree/main/Samples/hello-world/excel-hello-world)
 - [Outlook "Hello world" add-in](https://github.com/OfficeDev/Office-Add-in-samples/tree/main/Samples/hello-world/outlook-hello-world)