As mentioned above, FreeSync is AMD's Adaptive-Sync technology. It's aimed at competitive gamers who want the most precise picture while moving around, which is highly recommended for fast-paced shooter games. Screen tearing will occur if your monitor's refresh rate isn't similar to the game's frame rate.
Is FreeSync bad for gaming?
AMD FreeSync is worth it as it removes screen tearing and stuttering at no extra cost to the monitor as long as you have a compatible GPU. ... FreeSync can completely eliminate screen tearing and stuttering by providing you with a variable refresh rate if you have a compatible graphics card, so it's definitely worth it.
Is FreeSync good for console gaming?
Microsoft supports FreeSync on Xbox One consoles, adjusting refresh rates on the fly to reduce screen tearing and stuttering in gaming. While hundreds of special FreeSync-compatible displays are on the market, Xbox One consoles are limited to a subset with HDMI support.