Databings are essential for working with XAML. The XAML dialect for UWP apps provides a type of binding: the {x:Bind} markup extension.
Working with {Binding XXX} and {x:Bind XXX} is mostly equivalent, with the difference that the x:Bind extension works at compile time, which enables better debugging capabilities (e.g. break points) and better performance.
<object property="{x:Bind bindingPath}" />
The x:Bind markup extension is only available for UWP apps. Learn more about this in this MSDN article: https://msdn.microsoft.com/en-us/windows/uwp/data-binding/data-binding-in-depth.
Alternatives for Silverlight, WPF, Windows RT: Use the standard {Binding XXX} syntax:
<object property="{Binding bindingPath}" />