How to Review and Add Comments to a MS Word Document

MS Word offers a pretty elaborate review and commenting functionality through its Review tab.
Imagine we start with the following sample document:

(Click to enlarge all images)

We will make 3 changes to this document:

1. Replacing “In addition to” with “Besides” by typing over it.
2. Delete “and employees” from the second sentence.
3. Insert a comment, suggesting to change the word “Federal” with “Government”“.

IMPORTANT: Before doing anything click and toggle on the Track Changes button so that MS Word will keep a track of the above changes. That will help the reviewer to view each change and either accept or reject it.
Select the phrase “In addition to” and type “Besides” over it:

Delete the phrase “and employees”:

Here is how MS Word displays the review changes made so far on the right sidebar:

We insert a comment, suggesting to change the word “Federal” with “Government”:

Now, as a reviewer, select to accept all changes to the document:

Here is the result:

Press Ctrl + Y to see a summary of all changes on the left sidebar:

You can select to view the edited document in four ways:

Here is the Final view:

Here is the Final Showing Markup view:

Here is the Original view, BEFORE any edits:

And finally, here is the Original Showing Markup view: