1. On the "Home" tab of Word, click the far right icon labelled "Add-ins". Ensure you are signed into the correct Microsoft Account.

2. Click "More Add-ins"

3. In the popup window, Type "Spellbook" in the search bar and hit enter, or click the magnifying glass icon.

4. Click "Add" Next to Spellbook.

5. Click "Continue" to install Spellbook.

6. You will then be prompted to activate your license. Click on the black banner at the top and click Activate now

7. Then insert the license key you were provided (a series of numbers and letters) and click Activate

8. The Spellbook icon will pop up at the end of Word's Home tab and ready for you to use