Google Docs and Sheets Launches Add-Ons

Google launches add-ons to its Docs and Sheets apps. With add-ons written by developers, users would now be able to add in even more features in their documents and spreadsheets e.g. easily send documents as emails to contacts, create Avery address labels and name badges from Google spreadsheet data, adding track changes and approval workflow, etc.

This is really many steps ahead for Google.