The clipboard manager on both Windows and OS X copies the text and any formatting that has been applied to it. When you paste this text into a program that doesn’t support rich text like the address bar of your browser or a program like Notepad, the formatting is lost. If you instead paste it into a program like MS Word, or even in a browser based text editor like the Compose email box in Gmail, the formatting is duly preserved and likely to ruin the formatting of an entire email or document. Most text editors have a clear formatting button that you can use to quickly erase any and all text formatting from pasted text but it takes time and is nevertheless annoying. Here’s how you can tech MS Word to ignore formatting when you paste text from your browser, or even from a different document.
Open MS Word, go to File>Options and click on the Advance section. Scroll down to the Cut, copy, and Paste section and you will see four different options that let you select how to treat pasted text. Each option deals with a different point of origin for the text. Under ‘Pasting from other programs’ open the drop-down menu and select ‘Keep Text Only’. Your browser is a different program so anything you copy from the internet will be pasted as plain text.
You might want to follow suit for pasting between documents so that the formatting of one document doesn’t interfere or mess up the formatting of the document you are pasting the text to.