DirectX 11 (or DX11) is a set of drivers distributed by Microsoft that offer improved visual and audio performance. Its main function, and the one for which it is best known, is allow you to run games with excellent state of the art graphics in video games.
Why is it good
DirectX 11 makes it possible to enjoy your games and other multimedia applications with the best visuals possible. This pack of drivers is designed specially for Windows 7 and Windows 8. Updated regularly, the current version of DirectX is 11.2, though 11.3 is anticipated soon and is predicted to be the final stepping stone towards DirectX 12.
Many recent games only work with DirectX 11 installed. So, if you are hoping to play FIFA 15, Mortal Kombat X, Need for Speed: Most Wanted,Plants vs Zombies: Garden Warfare, or Call of Duty: Black Ops 2, it is essential. Other games, like GTA 5, improve significantly with these drivers.
Instructions: enjoy
Using DirectX 11 is as easy as installing it. You can download this driver library for free. But if you forget don’t worry, as all products that require DX11 (especially games) always come packaged with the version they need. Once you finish the basic installation of a product, it will typically then ask if you want to install DirectX 11 if you are missing it.
Once it is installed, you should not have to worry about it again – leaving you to enjoy the graphic and sound improvements it offers. Even better, it is very rare to encounter any problems with compatibility or performance related to these drivers.
What are you waiting?
Today is near impossible to use your PC without DirectX 11, especially if you're a gamer who likes to enjoy the latest titles. DirectX 11 is free, easy to install, and even easier to use, so grab it now – if you haven’t already. Source