Quick launch summary
It’s now easier for users of assistive technologies, like screen readers and Braille displays, to keep track of real-time updates made by collaborators in a document. With live edits, you can view a periodically updated summary of collaborator changes in a convenient sidebar. In Google Docs we believe that collaboration works best when it works for everyone.
To see live edits, open the Accessibility settings by going to Tools > Accessibility settings and check “Turn on screen reader support.” Then, select “Show live edits” from the Accessibility menu. To learn more, see this article in our Help Center.
Source: G Suite Updates