Google Keep lets you capture thoughts, ideas, action items, and more in one place for easy access through Google Docs. When you come across something you want to store for future re-use, just highlight it, right-click, and select Save to Keep notepad. The Keep notepad is available as a sidebar within Google Docs – just click on Keep notepad in the Tools menu, then edit those notes or copy them into your current document. All Keep notes automatically link back to the document from which they originated.

More info on the web at https://gsuiteupdates.googleblog.com/2017/02/google-keep-now-g-suite-core-service.html.