UTM Base

It's best practice to add UTMs to your URLs so that you can track where visitors came from including source (Facebook, Google, etc.), campaign (Black Friday, Retargeting), and individual ads (Headline 1, Image 2). Managing all of these in a uniform, standardized way in spreadsheets is an awful idea. I use UTM Base, a free app where I build all my links and save them in a library so I can reference later.