If you have manually flashed an Android phone before or have unlocked your bootloader, then you are familiar with the ADB and Fastboot commands that you use to make those changes to your Android devices. The challenge, till now, is that you either had to download the entire Android Developer Studio, all 1.6GB of it, just to get the official ADB or you had to go off piste and get it from a 3rd party. That, of course, opens you up to all kinds of fun like malware. Now you have a third option: Download these platform tools directly from Google.
Google has finally made it where you can download just these tools along with a few others without having to bother with the developer tools. Frankly, unless you are a developer, those tools eat up a huge amount of storage on your PC or Mac and are somewhat dead to you.