The Notes app has a robust share extension on both iOS and macOS. It’s actually the best way to add text and links to a note when you’re researching on the web. When you come across something interesting in an app like Safari, tap on the Share button and select Add to Notes.
From the popup, you can choose to make a new note or to add it an existing note. If there’s a link involved, you’ll see a little preview right there and you can even add a bit of text before sending it off to the Notes app by tapping on the Save button.
If you’ve got an iPad running iOS 11, this process becomes even simpler. Dock the Notes app next to Safari in split-screen mode and simply drag and drop links, photos, or text from Safari to the Notes app.