A family of Microsoft word processing software products for creating web, email, and print documents.
Some thoughts that may help: Scanners produce picture files as a starting place. Thus while a picture of an automobile can be quite engaging, trying to drive it anywhere will leave you frustrated. Likewise, a picture of text is just that, a picture.
Word does try to interpret that picture and turn it into text. This is called optical character recognition (OCR). There are other programs, probably one that came with your scanner, that are better at this than Word. None are perfect. If you are using scanned text, you need to proof-read.
I am a lawyer. I use scanned text often. When I do, I scan into a pdf form that is searchable. This means that an OCR process has been applied to the text. Then I copy the scanned text into a Word document as plain text (without formatting) and apply formatting using Styles in Word.
This gives me something that I can use for years without formatting problems. Just scanning directly into Word will give me a document that looks good, but is put together like a jigsaw puzzle. When I try to edit it, weird things happen.