The "Read Aloud" functionality in Microsoft Word is a text-to-speech feature that allows you to listen to your document being read aloud while highlighting the words as they are spoken . This feature can be useful for proofreading and editing your work, as well as for people who have difficulty reading or who are visually impaired .  

To use the "Read Aloud" functionality in Microsoft Word, you can follow these steps: 

1. Open your document in Microsoft Word. 

2. Click on the "Review" tab in the ribbon. 

3. Click on the "Read Aloud" button in the "Proofing" section. 

4. The "Read Aloud" feature will begin reading your document aloud. 

You can also customize the settings for the "Read Aloud" feature by clicking on the "Settings" button next to the "Read Aloud" button . This will allow you to adjust the voice and speed of the reading, as well as other settings . 

Some other text-to-speech features include: 

1. Natural sounding voices 

2. Simple and easy-to-use interface 

3.  Support for different languages and accents

4. Customization features

You can use the "Speak" feature in Microsoft Word to have text read aloud in the language of your version of Office. Depending upon your configuration and installed TTS engines, you can hear most text that appears on your screen in Word, Outlook, PowerPoint, and OneNote. 

Find out more about TTS engines with these resources: