Without this FUD starts about keyloggers and web tracking that may or may not be happening in reality.
"Send Microsoft info about how I write to help us improve typing and writing in the future"
(Sure, keyboard vs touch-screen possible.)
May just be for dictionary, but anyway:
"As part of that service, we also collect information from the user dictionary created on your device. This user dictionary stores unique words like names you write, which helps you type and ink more accurately. Both the voice data and the user dictionary are used in the aggregate to help improve our ability to correctly recognize all usersâ(TM) speech."
From the same page:
"If youâ(TM)ve allowed Cortana to do so, Microsoft also collects information about your Calendar and People (also known as contacts) to help personalize your speech experience, and to help Windows and Cortana better recognize people, events, places, and music when you dictate messages or documents. The information Cortana collects will help personalize your speech experience on all your Windows devices and Cortana apps when you sign in with the same Microsoft account."
"Microsoft Edge saves your browsing history, which is made up of info about the websites you visit, on your device. If the Diagnostics and usage setting is set to Full, this browsing history is sent to Microsoft, which helps us find and fix problems and improve our products and services for all users."