How to Use the Insert Comment Button in Google Docs

From The Gooru:

Commenting in Google Docs just got easier. Collaboration is a strong feature in Google Docs and now there’s a feature to make your comment faster. An Insert Comment button now appears in the Google Doc when you highlight any text in the body of the document. Previously, you had to click Insert > Comment. Now, a few steps are removed to make instant feedback, instant.

See the demo here.