If you often copy text from email messages or other online sources into a Word document, all the hyperlinks from those web pages and email addresses will carry over.
You could go through each link one by one, right click and choose Remove Hyperlink but that will certainly take some time if you have many links.
There is a fast and easier way – select the entire block of text and then press <Ctrl> <Shift> <F9>. The result – the hyperlinks are all gone. Note that on some PCs, you may see the former link underlined and in color but then you can again select the entire text and correct those settings globally.